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network: introduce network_verify_address_labels()
[thirdparty/systemd.git] / src / network / networkd-link.c
CommitLineData
53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
f579559b 2
9aa5d8ba 3#include <netinet/in.h>
f579559b 4#include <linux/if.h>
8f815e8b 5#include <linux/if_arp.h>
518cd6b5 6#include <linux/if_link.h>
4cc7a82c 7#include <unistd.h>
f579559b 8
b5efdb8a 9#include "alloc-util.h"
737f1405
YW		 10#include "bond.h"
11#include "bridge.h"
1346b1f0 12#include "bus-util.h"
27dfc982 13#include "dhcp-identifier.h"
bd91b83e 14#include "dhcp-lease-internal.h"
686d13b9 15#include "env-file.h"
4bb7cc82 16#include "ethtool-util.h"
3ffd4af2 17#include "fd-util.h"
cf1d700d 18#include "fileio.h"
737f1405 19#include "ipvlan.h"
ef118d00 20#include "missing_network.h"
cf1d700d 21#include "netlink-util.h"
c6f7c917 22#include "network-internal.h"
3ddcbeea 23#include "networkd-can.h"
8fcf1d61 24#include "networkd-dhcp-server.h"
ca5ad760
YW		 25#include "networkd-dhcp4.h"
26#include "networkd-dhcp6.h"
27#include "networkd-ipv4ll.h"
a0e5c15d 28#include "networkd-ipv6-proxy-ndp.h"
6a1af3d4
YW		 29#include "networkd-link-bus.h"
30#include "networkd-link.h"
8e1ad1ea 31#include "networkd-lldp-tx.h"
23f53b99 32#include "networkd-manager.h"
1e7a0e21 33#include "networkd-ndisc.h"
e4a71bf3 34#include "networkd-neighbor.h"
75156ccb 35#include "networkd-nexthop.h"
518cd6b5 36#include "networkd-sriov.h"
7465dd22 37#include "networkd-radv.h"
bce67bbe 38#include "networkd-routing-policy-rule.h"
8d968fdd 39#include "networkd-wifi.h"
cf1d700d
TG		 40#include "set.h"
41#include "socket-util.h"
bf331d87 42#include "stat-util.h"
15a5e950 43#include "stdio-util.h"
8b43440b 44#include "string-table.h"
51517f9e 45#include "strv.h"
62e021a9 46#include "sysctl-util.h"
34658df2 47#include "tc.h"
e4de7287 48#include "tmpfile-util.h"
299ad32d 49#include "udev-util.h"
cf1d700d 50#include "util.h"
737f1405 51#include "vrf.h"
fc2f9534 52
bdb9f580
YW		 53uint32_t link_get_vrf_table(Link *link) {
54 return link->network->vrf ? VRF(link->network->vrf)->table : RT_TABLE_MAIN;
55}
56
57uint32_t link_get_dhcp_route_table(Link *link) {
58 /* When the interface is part of an VRF use the VRFs routing table, unless
59 * another table is explicitly specified. */
60 if (link->network->dhcp_route_table_set)
61 return link->network->dhcp_route_table;
62 return link_get_vrf_table(link);
63}
64
65uint32_t link_get_ipv6_accept_ra_route_table(Link *link) {
66 if (link->network->ipv6_accept_ra_route_table_set)
67 return link->network->ipv6_accept_ra_route_table;
68 return link_get_vrf_table(link);
69}
70
f24648a6
YW		 71DUID* link_get_duid(Link *link) {
72 if (link->network->duid.type != _DUID_TYPE_INVALID)
73 return &link->network->duid;
74 else
75 return &link->manager->duid;
76}
77
b9d74c40
LP		 78static bool link_dhcp6_enabled(Link *link) {
79 assert(link);
80
fa709992
LP		 81 if (!socket_ipv6_is_supported())
82 return false;
83
78c958f8
TG		 84 if (link->flags & IFF_LOOPBACK)
85 return false;
86
87 if (!link->network)
88 return false;
89
f2bfcdb9
YW		 90 if (link->network->bond)
91 return false;
92
500b96eb 93 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 94 return false;
95
e0ee46f2 96 return link->network->dhcp & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 97}
98
b9d74c40
LP		 99static bool link_dhcp4_enabled(Link *link) {
100 assert(link);
101
78c958f8
TG		 102 if (link->flags & IFF_LOOPBACK)
103 return false;
104
105 if (!link->network)
106 return false;
107
f2bfcdb9
YW		 108 if (link->network->bond)
109 return false;
110
500b96eb 111 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 112 return false;
113
e0ee46f2 114 return link->network->dhcp & ADDRESS_FAMILY_IPV4;
78c958f8
TG		 115}
116
b9d74c40
LP		 117static bool link_dhcp4_server_enabled(Link *link) {
118 assert(link);
119
78c958f8
TG		 120 if (link->flags & IFF_LOOPBACK)
121 return false;
122
123 if (!link->network)
124 return false;
125
f2bfcdb9
YW		 126 if (link->network->bond)
127 return false;
128
500b96eb 129 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 130 return false;
131
78c958f8
TG		 132 return link->network->dhcp_server;
133}
134
2d792895 135bool link_ipv4ll_enabled(Link *link, AddressFamily mask) {
b9d74c40 136 assert(link);
910feb78 137 assert((mask & ~(ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) == 0);
b9d74c40 138
78c958f8
TG		 139 if (link->flags & IFF_LOOPBACK)
140 return false;
141
142 if (!link->network)
143 return false;
144
500b96eb 145 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 146 return false;
147
98d20a17 148 if (STRPTR_IN_SET(link->kind,
149 "vrf", "wireguard", "ipip", "gre", "ip6gre","ip6tnl", "sit", "vti",
b0486c73 150 "vti6", "nlmon", "xfrm", "bareudp"))
a8f5bba6
JD		 151 return false;
152
f410d463
YW		 153 /* L3 or L3S mode do not support ARP. */
154 if (IN_SET(link_get_ipvlan_mode(link), NETDEV_IPVLAN_MODE_L3, NETDEV_IPVLAN_MODE_L3S))
155 return false;
156
f2bfcdb9
YW		 157 if (link->network->bond)
158 return false;
159
910feb78 160 return link->network->link_local & mask;
8bc17bb3
SS		 161}
162
b9d74c40
LP		 163static bool link_ipv6ll_enabled(Link *link) {
164 assert(link);
165
fa709992
LP		 166 if (!socket_ipv6_is_supported())
167 return false;
168
d0d6a4cd
TG		 169 if (link->flags & IFF_LOOPBACK)
170 return false;
171
172 if (!link->network)
173 return false;
174
500b96eb 175 if (link->iftype == ARPHRD_CAN)
c6ac3729
YW		 176 return false;
177
178 if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
a8f5bba6
JD		 179 return false;
180
f2bfcdb9
YW		 181 if (link->network->bond)
182 return false;
183
e0ee46f2 184 return link->network->link_local & ADDRESS_FAMILY_IPV6;
78c958f8
TG		 185}
186
439689c6
SS		 187static bool link_ipv6_enabled(Link *link) {
188 assert(link);
189
190 if (!socket_ipv6_is_supported())
191 return false;
192
b102cdca 193 if (link->network->bond)
2b00a4e0
TY		 194 return false;
195
500b96eb 196 if (link->iftype == ARPHRD_CAN)
af9ba57a
YW		 197 return false;
198
4cef7fe3 199 /* DHCPv6 client will not be started if no IPv6 link-local address is configured. */
adfeee49
YW		 200 if (link_ipv6ll_enabled(link))
201 return true;
202
203 if (network_has_static_ipv6_configurations(link->network))
204 return true;
205
206 return false;
439689c6
SS		 207}
208
7465dd22
PF		 209static bool link_radv_enabled(Link *link) {
210 assert(link);
211
212 if (!link_ipv6ll_enabled(link))
213 return false;
214
55a7c78b 215 return link->network->router_prefix_delegation != RADV_PREFIX_DELEGATION_NONE;
7465dd22
PF		 216}
217
769d324c 218static bool link_ipv4_forward_enabled(Link *link) {
b9d74c40
LP		 219 assert(link);
220
5a8bcb67
LP		 221 if (link->flags & IFF_LOOPBACK)
222 return false;
223
224 if (!link->network)
225 return false;
226
2d792895 227 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 228 return false;
229
e0ee46f2 230 return link->network->ip_forward & ADDRESS_FAMILY_IPV4;
769d324c
LP		 231}
232
233static bool link_ipv6_forward_enabled(Link *link) {
b9d74c40 234 assert(link);
765afd5c
LP		 235
236 if (!socket_ipv6_is_supported())
237 return false;
238
769d324c
LP		 239 if (link->flags & IFF_LOOPBACK)
240 return false;
241
242 if (!link->network)
243 return false;
244
2d792895 245 if (link->network->ip_forward == _ADDRESS_FAMILY_INVALID)
765afd5c
LP		 246 return false;
247
e0ee46f2 248 return link->network->ip_forward & ADDRESS_FAMILY_IPV6;
5a8bcb67
LP		 249}
250
23d8b221
SS		 251static bool link_proxy_arp_enabled(Link *link) {
252 assert(link);
253
254 if (link->flags & IFF_LOOPBACK)
255 return false;
256
257 if (!link->network)
258 return false;
259
260 if (link->network->proxy_arp < 0)
261 return false;
262
263 return true;
264}
265
b9d74c40
LP		 266static bool link_ipv6_accept_ra_enabled(Link *link) {
267 assert(link);
268
fa709992
LP		 269 if (!socket_ipv6_is_supported())
270 return false;
271
f5a8c43f
TG		 272 if (link->flags & IFF_LOOPBACK)
273 return false;
274
275 if (!link->network)
276 return false;
277
702c979f
SS		 278 if (!link_ipv6ll_enabled(link))
279 return false;
280
f5a8c43f
TG		 281 /* If unset use system default (enabled if local forwarding is disabled.
282 * disabled if local forwarding is enabled).
283 * If set, ignore or enforce RA independent of local forwarding state.
284 */
285 if (link->network->ipv6_accept_ra < 0)
286 /* default to accept RA if ip_forward is disabled and ignore RA if ip_forward is enabled */
287 return !link_ipv6_forward_enabled(link);
288 else if (link->network->ipv6_accept_ra > 0)
289 /* accept RA even if ip_forward is enabled */
290 return true;
291 else
292 /* ignore RA */
293 return false;
294}
295
1f0d9695 296static IPv6PrivacyExtensions link_ipv6_privacy_extensions(Link *link) {
fa709992 297 assert(link);
d68e2e59
LP		 298
299 if (!socket_ipv6_is_supported())
300 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
301
49092e22 302 if (link->flags & IFF_LOOPBACK)
1f0d9695 303 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 304
305 if (!link->network)
1f0d9695 306 return _IPV6_PRIVACY_EXTENSIONS_INVALID;
49092e22
SS		 307
308 return link->network->ipv6_privacy_extensions;
309}
310
57ad7607 311static int link_update_ipv6_sysctl(Link *link) {
482efedc 312 bool enabled;
439689c6
SS		 313 int r;
314
315 if (link->flags & IFF_LOOPBACK)
316 return 0;
317
482efedc
SS		 318 enabled = link_ipv6_enabled(link);
319 if (enabled) {
320 r = sysctl_write_ip_property_boolean(AF_INET6, link->ifname, "disable_ipv6", false);
321 if (r < 0)
57ad7607
ZJS		 322 return log_link_warning_errno(link, r, "Cannot enable IPv6: %m");
323
324 log_link_info(link, "IPv6 successfully enabled");
482efedc 325 }
439689c6
SS		 326
327 return 0;
328}
329
34bf3c00
YW		 330static bool link_is_enslaved(Link *link) {
331 if (link->flags & IFF_SLAVE)
332 /* Even if the link is not managed by networkd, honor IFF_SLAVE flag. */
333 return true;
334
34bf3c00
YW		 335 if (!link->network)
336 return false;
337
bb262ef0 338 if (link->master_ifindex > 0 && link->network->bridge)
34bf3c00
YW		 339 return true;
340
bb262ef0
YW		 341 /* TODO: add conditions for other netdevs. */
342
34bf3c00
YW		 343 return false;
344}
345
45e11abf
YW		 346static void link_update_master_operstate(Link *link, NetDev *netdev) {
347 Link *master;
348
349 if (!netdev)
350 return;
351
7936917e
YW		 352 if (netdev->ifindex <= 0)
353 return;
354
45e11abf
YW		 355 if (link_get(link->manager, netdev->ifindex, &master) < 0)
356 return;
357
358 link_update_operstate(master, true);
359}
360
361void link_update_operstate(Link *link, bool also_update_master) {
84de38c5 362 LinkOperationalState operstate;
1678fbb3
YW		 363 LinkCarrierState carrier_state;
364 LinkAddressState address_state;
35c5a9ca 365 _cleanup_strv_free_ char **p = NULL;
1678fbb3 366 uint8_t scope = RT_SCOPE_NOWHERE;
35c5a9ca 367 bool changed = false;
1678fbb3 368 Address *address;
14153d1b 369
84de38c5
TG		 370 assert(link);
371
372 if (link->kernel_operstate == IF_OPER_DORMANT)
1678fbb3 373 carrier_state = LINK_CARRIER_STATE_DORMANT;
84de38c5 374 else if (link_has_carrier(link)) {
1678fbb3
YW		 375 if (link_is_enslaved(link))
376 carrier_state = LINK_CARRIER_STATE_ENSLAVED;
84de38c5 377 else
1678fbb3 378 carrier_state = LINK_CARRIER_STATE_CARRIER;
84de38c5 379 } else if (link->flags & IFF_UP)
1678fbb3 380 carrier_state = LINK_CARRIER_STATE_NO_CARRIER;
84de38c5 381 else
1678fbb3 382 carrier_state = LINK_CARRIER_STATE_OFF;
84de38c5 383
1678fbb3 384 if (carrier_state >= LINK_CARRIER_STATE_CARRIER) {
959f65d3
YW		 385 Link *slave;
386
90e74a66 387 SET_FOREACH(slave, link->slaves) {
959f65d3 388 link_update_operstate(slave, false);
84de38c5 389
1678fbb3
YW		 390 if (slave->carrier_state < LINK_CARRIER_STATE_CARRIER)
391 carrier_state = LINK_CARRIER_STATE_DEGRADED_CARRIER;
84de38c5 392 }
959f65d3 393 }
84de38c5 394
90e74a66 395 SET_FOREACH(address, link->addresses) {
1678fbb3
YW		 396 if (!address_is_ready(address))
397 continue;
84de38c5 398
1678fbb3
YW		 399 if (address->scope < scope)
400 scope = address->scope;
401 }
84de38c5 402
1678fbb3 403 /* for operstate we also take foreign addresses into account */
90e74a66 404 SET_FOREACH(address, link->addresses_foreign) {
1678fbb3
YW		 405 if (!address_is_ready(address))
406 continue;
407
408 if (address->scope < scope)
409 scope = address->scope;
410 }
411
412 if (scope < RT_SCOPE_SITE)
413 /* universally accessible addresses found */
414 address_state = LINK_ADDRESS_STATE_ROUTABLE;
415 else if (scope < RT_SCOPE_HOST)
416 /* only link or site local addresses found */
417 address_state = LINK_ADDRESS_STATE_DEGRADED;
84de38c5 418 else
1678fbb3
YW		 419 /* no useful addresses found */
420 address_state = LINK_ADDRESS_STATE_OFF;
421
422 /* Mapping of address and carrier state vs operational state
423 * carrier state
424 * | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
425 * ------------------------------------------------------------------------------
426 * off | off | no-carrier | dormant | degraded-carrier | carrier | enslaved
427 * address_state degraded | off | no-carrier | dormant | degraded-carrier | degraded | enslaved
428 * routable | off | no-carrier | dormant | degraded-carrier | routable | routable
429 */
84de38c5 430
1678fbb3
YW		 431 if (carrier_state < LINK_CARRIER_STATE_CARRIER || address_state == LINK_ADDRESS_STATE_OFF)
432 operstate = (LinkOperationalState) carrier_state;
433 else if (address_state == LINK_ADDRESS_STATE_ROUTABLE)
434 operstate = LINK_OPERSTATE_ROUTABLE;
435 else if (carrier_state == LINK_CARRIER_STATE_CARRIER)
436 operstate = LINK_OPERSTATE_DEGRADED;
437 else
14153d1b
YW		 438 operstate = LINK_OPERSTATE_ENSLAVED;
439
35c5a9ca
YW		 440 if (link->carrier_state != carrier_state) {
441 link->carrier_state = carrier_state;
442 changed = true;
443 if (strv_extend(&p, "CarrierState") < 0)
444 log_oom();
445 }
959f65d3 446
35c5a9ca
YW		 447 if (link->address_state != address_state) {
448 link->address_state = address_state;
449 changed = true;
450 if (strv_extend(&p, "AddressState") < 0)
451 log_oom();
959f65d3
YW		 452 }
453
84de38c5
TG		 454 if (link->operstate != operstate) {
455 link->operstate = operstate;
35c5a9ca
YW		 456 changed = true;
457 if (strv_extend(&p, "OperationalState") < 0)
458 log_oom();
84de38c5 459 }
959f65d3 460
35c5a9ca
YW		 461 if (p)
462 link_send_changed_strv(link, p);
463 if (changed)
464 link_dirty(link);
465
45e11abf
YW		 466 if (also_update_master && link->network) {
467 link_update_master_operstate(link, link->network->bond);
468 link_update_master_operstate(link, link->network->bridge);
959f65d3 469 }
84de38c5
TG		 470}
471
51d18171
TG		 472#define FLAG_STRING(string, flag, old, new) \
473 (((old ^ new) & flag) \
474 ? ((old & flag) ? (" -" string) : (" +" string)) \
475 : "")
476
bb262ef0 477static int link_update_flags(Link *link, sd_netlink_message *m, bool force_update_operstate) {
51d18171
TG		 478 unsigned flags, unknown_flags_added, unknown_flags_removed, unknown_flags;
479 uint8_t operstate;
480 int r;
481
482 assert(link);
483
484 r = sd_rtnl_message_link_get_flags(m, &flags);
6a7a4e4d
LP		 485 if (r < 0)
486 return log_link_warning_errno(link, r, "Could not get link flags: %m");
51d18171 487
1c4baffc 488 r = sd_netlink_message_read_u8(m, IFLA_OPERSTATE, &operstate);
51d18171
TG		 489 if (r < 0)
490 /* if we got a message without operstate, take it to mean
491 the state was unchanged */
492 operstate = link->kernel_operstate;
493
bb262ef0 494 if (!force_update_operstate && (link->flags == flags) && (link->kernel_operstate == operstate))
51d18171
TG		 495 return 0;
496
497 if (link->flags != flags) {
6a7a4e4d 498 log_link_debug(link, "Flags change:%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
51d18171
TG		 499 FLAG_STRING("LOOPBACK", IFF_LOOPBACK, link->flags, flags),
500 FLAG_STRING("MASTER", IFF_MASTER, link->flags, flags),
501 FLAG_STRING("SLAVE", IFF_SLAVE, link->flags, flags),
502 FLAG_STRING("UP", IFF_UP, link->flags, flags),
503 FLAG_STRING("DORMANT", IFF_DORMANT, link->flags, flags),
504 FLAG_STRING("LOWER_UP", IFF_LOWER_UP, link->flags, flags),
505 FLAG_STRING("RUNNING", IFF_RUNNING, link->flags, flags),
506 FLAG_STRING("MULTICAST", IFF_MULTICAST, link->flags, flags),
507 FLAG_STRING("BROADCAST", IFF_BROADCAST, link->flags, flags),
508 FLAG_STRING("POINTOPOINT", IFF_POINTOPOINT, link->flags, flags),
509 FLAG_STRING("PROMISC", IFF_PROMISC, link->flags, flags),
510 FLAG_STRING("ALLMULTI", IFF_ALLMULTI, link->flags, flags),
511 FLAG_STRING("PORTSEL", IFF_PORTSEL, link->flags, flags),
512 FLAG_STRING("AUTOMEDIA", IFF_AUTOMEDIA, link->flags, flags),
513 FLAG_STRING("DYNAMIC", IFF_DYNAMIC, link->flags, flags),
514 FLAG_STRING("NOARP", IFF_NOARP, link->flags, flags),
515 FLAG_STRING("NOTRAILERS", IFF_NOTRAILERS, link->flags, flags),
516 FLAG_STRING("DEBUG", IFF_DEBUG, link->flags, flags),
517 FLAG_STRING("ECHO", IFF_ECHO, link->flags, flags));
518
519 unknown_flags = ~(IFF_LOOPBACK | IFF_MASTER | IFF_SLAVE | IFF_UP |
520 IFF_DORMANT | IFF_LOWER_UP | IFF_RUNNING |
521 IFF_MULTICAST | IFF_BROADCAST | IFF_POINTOPOINT |
522 IFF_PROMISC | IFF_ALLMULTI | IFF_PORTSEL |
523 IFF_AUTOMEDIA | IFF_DYNAMIC | IFF_NOARP |
524 IFF_NOTRAILERS | IFF_DEBUG | IFF_ECHO);
525 unknown_flags_added = ((link->flags ^ flags) & flags & unknown_flags);
526 unknown_flags_removed = ((link->flags ^ flags) & link->flags & unknown_flags);
527
528 /* link flags are currently at most 18 bits, let's align to
529 * printing 20 */
530 if (unknown_flags_added)
79008bdd 531 log_link_debug(link,
6a7a4e4d 532 "Unknown link flags gained: %#.5x (ignoring)",
51d18171
TG		 533 unknown_flags_added);
534
535 if (unknown_flags_removed)
79008bdd 536 log_link_debug(link,
6a7a4e4d 537 "Unknown link flags lost: %#.5x (ignoring)",
51d18171
TG		 538 unknown_flags_removed);
539 }
540
541 link->flags = flags;
542 link->kernel_operstate = operstate;
543
959f65d3 544 link_update_operstate(link, true);
51d18171
TG		 545
546 return 0;
547}
548
1c4baffc 549static int link_new(Manager *manager, sd_netlink_message *message, Link **ret) {
8e766630 550 _cleanup_(link_unrefp) Link *link = NULL;
6cad256d 551 const char *ifname, *kind = NULL;
b710e6b6 552 unsigned short iftype;
572b21d9
YW		 553 int r, ifindex;
554 uint16_t type;
f579559b 555
0c2f9b84 556 assert(manager);
505f8da7 557 assert(message);
f579559b
TG		 558 assert(ret);
559
6cad256d
TJ		 560 /* check for link kind */
561 r = sd_netlink_message_enter_container(message, IFLA_LINKINFO);
562 if (r == 0) {
db2f8a2e 563 (void) sd_netlink_message_read_string(message, IFLA_INFO_KIND, &kind);
6cad256d
TJ		 564 r = sd_netlink_message_exit_container(message);
565 if (r < 0)
566 return r;
567 }
568
1c4baffc 569 r = sd_netlink_message_get_type(message, &type);
505f8da7
TG		 570 if (r < 0)
571 return r;
572 else if (type != RTM_NEWLINK)
573 return -EINVAL;
574
575 r = sd_rtnl_message_link_get_ifindex(message, &ifindex);
576 if (r < 0)
577 return r;
578 else if (ifindex <= 0)
579 return -EINVAL;
580
b710e6b6
LP		 581 r = sd_rtnl_message_link_get_type(message, &iftype);
582 if (r < 0)
583 return r;
584
1c4baffc 585 r = sd_netlink_message_read_string(message, IFLA_IFNAME, &ifname);
505f8da7
TG		 586 if (r < 0)
587 return r;
588
17f9c355 589 link = new(Link, 1);
f579559b
TG		 590 if (!link)
591 return -ENOMEM;
592
17f9c355
YW		 593 *link = (Link) {
594 .n_ref = 1,
595 .manager = manager,
596 .state = LINK_STATE_PENDING,
17f9c355
YW		 597 .ifindex = ifindex,
598 .iftype = iftype,
15761549
YW		 599
600 .n_dns = (unsigned) -1,
601 .dns_default_route = -1,
602 .llmnr = _RESOLVE_SUPPORT_INVALID,
603 .mdns = _RESOLVE_SUPPORT_INVALID,
604 .dnssec_mode = _DNSSEC_MODE_INVALID,
605 .dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID,
17f9c355
YW		 606 };
607
505f8da7
TG		 608 link->ifname = strdup(ifname);
609 if (!link->ifname)
610 return -ENOMEM;
f579559b 611
6cad256d
TJ		 612 if (kind) {
613 link->kind = strdup(kind);
614 if (!link->kind)
615 return -ENOMEM;
616 }
617
cbff7170
TJ		 618 r = sd_netlink_message_read_u32(message, IFLA_MASTER, (uint32_t *)&link->master_ifindex);
619 if (r < 0)
620 log_link_debug_errno(link, r, "New device has no master, continuing without");
621
1c4baffc 622 r = sd_netlink_message_read_ether_addr(message, IFLA_ADDRESS, &link->mac);
512922f8 623 if (r < 0)
34437b4f 624 log_link_debug_errno(link, r, "MAC address not found for new device, continuing without");
512922f8 625
c643bda5 626 r = ethtool_get_permanent_macaddr(&manager->ethtool_fd, link->ifname, &link->permanent_mac);
4bb7cc82
YW		 627 if (r < 0)
628 log_link_debug_errno(link, r, "Permanent MAC address not found for new device, continuing without: %m");
629
c643bda5
YW		 630 r = ethtool_get_driver(&manager->ethtool_fd, link->ifname, &link->driver);
631 if (r < 0)
632 log_link_debug_errno(link, r, "Failed to get driver, continuing without: %m");
633
572b21d9
YW		 634 r = sd_netlink_message_read_strv(message, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &link->alternative_names);
635 if (r < 0 && r != -ENODATA)
636 return r;
637
34437b4f 638 if (asprintf(&link->state_file, "/run/systemd/netif/links/%d", link->ifindex) < 0)
315db1a8 639 return -ENOMEM;
fe8db0c5 640
34437b4f 641 if (asprintf(&link->lease_file, "/run/systemd/netif/leases/%d", link->ifindex) < 0)
68a8723c
TG		 642 return -ENOMEM;
643
34437b4f 644 if (asprintf(&link->lldp_file, "/run/systemd/netif/lldp/%d", link->ifindex) < 0)
49699bac
SS		 645 return -ENOMEM;
646
d5099efc 647 r = hashmap_ensure_allocated(&manager->links, NULL);
ae06ab10
TG		 648 if (r < 0)
649 return r;
650
651 r = hashmap_put(manager->links, INT_TO_PTR(link->ifindex), link);
f579559b
TG		 652 if (r < 0)
653 return r;
654
bb262ef0 655 r = link_update_flags(link, message, false);
51d18171
TG		 656 if (r < 0)
657 return r;
658
1cc6c93a 659 *ret = TAKE_PTR(link);
f579559b
TG		 660
661 return 0;
662}
663
15761549
YW		 664void link_ntp_settings_clear(Link *link) {
665 link->ntp = strv_free(link->ntp);
666}
667
668void link_dns_settings_clear(Link *link) {
e77bd3fd
YW		 669 if (link->n_dns != (unsigned) -1)
670 for (unsigned i = 0; i < link->n_dns; i++)
671 in_addr_full_free(link->dns[i]);
15761549
YW		 672 link->dns = mfree(link->dns);
673 link->n_dns = (unsigned) -1;
674
675 link->search_domains = ordered_set_free_free(link->search_domains);
676 link->route_domains = ordered_set_free_free(link->route_domains);
677
678 link->dns_default_route = -1;
679 link->llmnr = _RESOLVE_SUPPORT_INVALID;
680 link->mdns = _RESOLVE_SUPPORT_INVALID;
681 link->dnssec_mode = _DNSSEC_MODE_INVALID;
682 link->dns_over_tls_mode = _DNS_OVER_TLS_MODE_INVALID;
683
684 link->dnssec_negative_trust_anchors = set_free_free(link->dnssec_negative_trust_anchors);
685}
686
1a6bb31f
YW		 687static void link_free_engines(Link *link) {
688 if (!link)
689 return;
690
691 link->dhcp_server = sd_dhcp_server_unref(link->dhcp_server);
692 link->dhcp_client = sd_dhcp_client_unref(link->dhcp_client);
693 link->dhcp_lease = sd_dhcp_lease_unref(link->dhcp_lease);
1a6bb31f
YW		 694
695 link->lldp = sd_lldp_unref(link->lldp);
696
697 ndisc_flush(link);
698
699 link->ipv4ll = sd_ipv4ll_unref(link->ipv4ll);
700 link->dhcp6_client = sd_dhcp6_client_unref(link->dhcp6_client);
1633c457 701 link->dhcp6_lease = sd_dhcp6_lease_unref(link->dhcp6_lease);
1a6bb31f
YW		 702 link->ndisc = sd_ndisc_unref(link->ndisc);
703 link->radv = sd_radv_unref(link->radv);
704}
705
8301aa0b 706static Link *link_free(Link *link) {
428fd0a7
TG		 707 Address *address;
708
8301aa0b 709 assert(link);
f579559b 710
15761549
YW		 711 link_ntp_settings_clear(link);
712 link_dns_settings_clear(link);
713
8eec0b9d
YW		 714 link->routes = set_free(link->routes);
715 link->routes_foreign = set_free(link->routes_foreign);
6e537f62
YW		 716 link->dhcp_routes = set_free(link->dhcp_routes);
717 link->dhcp_routes_old = set_free(link->dhcp_routes_old);
1633c457
YW		 718 link->dhcp6_routes = set_free(link->dhcp6_routes);
719 link->dhcp6_routes_old = set_free(link->dhcp6_routes_old);
720 link->dhcp6_pd_routes = set_free(link->dhcp6_pd_routes);
721 link->dhcp6_pd_routes_old = set_free(link->dhcp6_pd_routes_old);
69203fba 722 link->ndisc_routes = set_free(link->ndisc_routes);
adda1ed9 723
8eec0b9d
YW		 724 link->nexthops = set_free(link->nexthops);
725 link->nexthops_foreign = set_free(link->nexthops_foreign);
c16c7808 726
8eec0b9d
YW		 727 link->neighbors = set_free(link->neighbors);
728 link->neighbors_foreign = set_free(link->neighbors_foreign);
d1bdafd2 729
8eec0b9d
YW		 730 link->addresses = set_free(link->addresses);
731 link->addresses_foreign = set_free(link->addresses_foreign);
e5526518 732 link->static_addresses = set_free(link->static_addresses);
1633c457
YW		 733 link->dhcp6_addresses = set_free(link->dhcp6_addresses);
734 link->dhcp6_addresses_old = set_free(link->dhcp6_addresses_old);
735 link->dhcp6_pd_addresses = set_free(link->dhcp6_pd_addresses);
736 link->dhcp6_pd_addresses_old = set_free(link->dhcp6_pd_addresses_old);
69203fba 737 link->ndisc_addresses = set_free(link->ndisc_addresses);
adda1ed9 738
11bf3cce
LP		 739 while ((address = link->pool_addresses)) {
740 LIST_REMOVE(addresses, link->pool_addresses, address);
741 address_free(address);
742 }
743
7272b25e 744 link_lldp_emit_stop(link);
1a6bb31f 745 link_free_engines(link);
68a8723c 746 free(link->lease_file);
49699bac
SS		 747 free(link->lldp_file);
748
c166a070 749 free(link->ifname);
572b21d9 750 strv_free(link->alternative_names);
ceac4078 751 free(link->kind);
8d968fdd 752 free(link->ssid);
c643bda5 753 free(link->driver);
6cad256d 754
db2f8a2e 755 (void) unlink(link->state_file);
fe8db0c5 756 free(link->state_file);
c166a070 757
51517f9e 758 sd_device_unref(link->sd_device);
b5db00e5 759
0d4ad91d 760 hashmap_free(link->bound_to_links);
0d4ad91d
AR		 761 hashmap_free(link->bound_by_links);
762
5f707e12 763 set_free_with_destructor(link->slaves, link_unref);
033295c1 764
c9c908a6
YW		 765 network_unref(link->network);
766
8301aa0b 767 return mfree(link);
14b746f7
TG		 768}
769
8301aa0b 770DEFINE_TRIVIAL_REF_UNREF_FUNC(Link, link, link_free);
14b746f7 771
11a7f229
TG		 772int link_get(Manager *m, int ifindex, Link **ret) {
773 Link *link;
11a7f229
TG		 774
775 assert(m);
e856ed00 776 assert(ifindex > 0);
11a7f229
TG		 777 assert(ret);
778
ae06ab10 779 link = hashmap_get(m->links, INT_TO_PTR(ifindex));
11a7f229
TG		 780 if (!link)
781 return -ENODEV;
782
783 *ret = link;
784
785 return 0;
786}
787
af9ba57a 788void link_set_state(Link *link, LinkState state) {
e331e246
TG		 789 assert(link);
790
791 if (link->state == state)
792 return;
793
0beb9542
YW		 794 log_link_debug(link, "State changed: %s -> %s",
795 link_state_to_string(link->state),
796 link_state_to_string(state));
797
e331e246
TG		 798 link->state = state;
799
800 link_send_changed(link, "AdministrativeState", NULL);
e331e246
TG		 801}
802
57bd6899
TG		 803static void link_enter_unmanaged(Link *link) {
804 assert(link);
805
e331e246 806 link_set_state(link, LINK_STATE_UNMANAGED);
57bd6899 807
84de38c5 808 link_dirty(link);
57bd6899
TG		 809}
810
95355a28 811int link_stop_clients(Link *link, bool may_keep_dhcp) {
111bb8f9 812 int r = 0, k;
051e77ca 813 Address *ad;
111bb8f9
TG		 814
815 assert(link);
816 assert(link->manager);
817 assert(link->manager->event);
818
80060352
ZJS		 819 bool keep_dhcp = may_keep_dhcp &&
820 link->network &&
821 (link->manager->restarting ||
822 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP_ON_STOP));
823
824 if (link->dhcp_client && !keep_dhcp) {
111bb8f9 825 k = sd_dhcp_client_stop(link->dhcp_client);
6a7a4e4d 826 if (k < 0)
36c7d709 827 r = log_link_warning_errno(link, k, "Could not stop DHCPv4 client: %m");
111bb8f9
TG		 828 }
829
ba179154 830 if (link->ipv4ll) {
111bb8f9 831 k = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 832 if (k < 0)
36c7d709 833 r = log_link_warning_errno(link, k, "Could not stop IPv4 link-local: %m");
dd43110f
TG		 834 }
835
051e77ca
SS		 836 if (link->network)
837 LIST_FOREACH(addresses, ad, link->network->static_addresses)
838 if (ad->acd && sd_ipv4acd_is_running(ad->acd) == 0) {
839 k = sd_ipv4acd_stop(ad->acd);
840 if (k < 0)
841 r = log_link_warning_errno(link, k, "Could not stop IPv4 ACD client: %m");
842 }
843
f5a8c43f
TG		 844 if (link->dhcp6_client) {
845 k = sd_dhcp6_client_stop(link->dhcp6_client);
846 if (k < 0)
36c7d709 847 r = log_link_warning_errno(link, k, "Could not stop DHCPv6 client: %m");
f5a8c43f 848 }
4138fb2c 849
1633c457
YW		 850 if (link_dhcp6_pd_is_enabled(link)) {
851 k = dhcp6_pd_remove(link);
852 if (k < 0)
853 r = log_link_warning_errno(link, k, "Could not remove DHCPv6 PD addresses and routes: %m");
854 }
855
1e7a0e21
LP		 856 if (link->ndisc) {
857 k = sd_ndisc_stop(link->ndisc);
6a7a4e4d 858 if (k < 0)
36c7d709 859 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Discovery: %m");
4138fb2c
PF		 860 }
861
7465dd22 862 if (link->radv) {
290696e5 863 k = sd_radv_stop(link->radv);
7465dd22
PF		 864 if (k < 0)
865 r = log_link_warning_errno(link, k, "Could not stop IPv6 Router Advertisement: %m");
866 }
867
7272b25e 868 link_lldp_emit_stop(link);
111bb8f9
TG		 869 return r;
870}
871
b22d8a00 872void link_enter_failed(Link *link) {
ef1ba606 873 assert(link);
f882c247 874
370e9930 875 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2139694e
TG		 876 return;
877
6a7a4e4d 878 log_link_warning(link, "Failed");
449f7554 879
e331e246 880 link_set_state(link, LINK_STATE_FAILED);
fe8db0c5 881
95355a28 882 link_stop_clients(link, false);
111bb8f9 883
84de38c5 884 link_dirty(link);
f882c247
TG		 885}
886
7033af49
YW		 887static int link_join_netdevs_after_configured(Link *link) {
888 NetDev *netdev;
7033af49
YW		 889 int r;
890
90e74a66 891 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7033af49
YW		 892 if (netdev->ifindex > 0)
893 /* Assume already enslaved. */
894 continue;
895
896 if (netdev_get_create_type(netdev) != NETDEV_CREATE_AFTER_CONFIGURED)
897 continue;
898
899 log_struct(LOG_DEBUG,
900 LOG_LINK_INTERFACE(link),
901 LOG_NETDEV_INTERFACE(netdev),
902 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
903
904 r = netdev_join(netdev, link, NULL);
905 if (r < 0)
906 return log_struct_errno(LOG_WARNING, r,
907 LOG_LINK_INTERFACE(link),
908 LOG_NETDEV_INTERFACE(netdev),
909 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
910 }
911
912 return 0;
913}
914
e3a7b048 915static void link_enter_configured(Link *link) {
dd43110f
TG		 916 assert(link);
917 assert(link->network);
e3a7b048 918
289e6774 919 if (link->state != LINK_STATE_CONFIGURING)
e3a7b048 920 return;
dd43110f 921
e331e246 922 link_set_state(link, LINK_STATE_CONFIGURED);
dd43110f 923
7033af49
YW		 924 (void) link_join_netdevs_after_configured(link);
925
84de38c5 926 link_dirty(link);
dd43110f
TG		 927}
928
302a796f 929static int route_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 930 int r;
931
1046bf9b 932 assert(link);
7715629e 933 assert(link->route_messages > 0);
289e6774
WKI		 934 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
935 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 936
7715629e 937 link->route_messages--;
f882c247 938
77a008c0 939 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 940 return 1;
941
1c4baffc 942 r = sd_netlink_message_get_errno(m);
4ff296b0 943 if (r < 0 && r != -EEXIST) {
5ecb131d 944 log_link_message_warning_errno(link, m, r, "Could not set route");
4ff296b0
YW		 945 link_enter_failed(link);
946 return 1;
947 }
f882c247 948
7715629e 949 if (link->route_messages == 0) {
6a7a4e4d 950 log_link_debug(link, "Routes set");
7715629e 951 link->static_routes_configured = true;
c133770a 952 link_set_nexthop(link);
dd3efc09 953 }
f882c247
TG		 954
955 return 1;
956}
957
b5799eeb 958int link_request_set_routes(Link *link) {
bf61b05a
LP		 959 enum {
960 PHASE_NON_GATEWAY, /* First phase: Routes without a gateway */
961 PHASE_GATEWAY, /* Second phase: Routes with a gateway */
962 _PHASE_MAX
963 } phase;
a6cc569e 964 Route *rt;
f882c247
TG		 965 int r;
966
967 assert(link);
968 assert(link->network);
289e6774 969 assert(link->state != _LINK_STATE_INVALID);
f882c247 970
2428613f 971 link->static_routes_configured = false;
27c34f73 972
e5526518
YW		 973 if (!link->addresses_ready)
974 return 0;
975
4e2ef9d9
YW		 976 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
977 /* During configuring addresses, the link lost its carrier. As networkd is dropping
978 * the addresses now, let's not configure the routes either. */
979 return 0;
980
c0ec4746 981 r = link_set_routing_policy_rules(link);
f3ef324d
YW		 982 if (r < 0)
983 return r;
f882c247 984
bf61b05a
LP		 985 /* First add the routes that enable us to talk to gateways, then add in the others that need a gateway. */
986 for (phase = 0; phase < _PHASE_MAX; phase++)
987 LIST_FOREACH(routes, rt, link->network->static_routes) {
1985c54f
YW		 988 if (rt->gateway_from_dhcp)
989 continue;
0d34228f 990
6ff5cc6b 991 if ((in_addr_is_null(rt->family, &rt->gw) && ordered_set_isempty(rt->multipath_routes)) != (phase == PHASE_NON_GATEWAY))
bf61b05a 992 continue;
a6cc569e 993
80b0e860 994 r = route_configure(rt, link, route_handler, NULL);
4ff296b0
YW		 995 if (r < 0)
996 return log_link_warning_errno(link, r, "Could not set routes: %m");
c4423317
YW		 997 if (r > 0)
998 link->route_messages++;
0d34228f 999 }
f5be5601 1000
7715629e
ST		 1001 if (link->route_messages == 0) {
1002 link->static_routes_configured = true;
c133770a 1003 link_set_nexthop(link);
b425c3ae 1004 } else {
6a7a4e4d 1005 log_link_debug(link, "Setting routes");
b425c3ae
YW		 1006 link_set_state(link, LINK_STATE_CONFIGURING);
1007 }
f882c247
TG		 1008
1009 return 0;
1010}
1011
6accfd31
DA		 1012void link_check_ready(Link *link) {
1013 Address *a;
6accfd31
DA		 1014
1015 assert(link);
1016
5f58af25
YW		 1017 if (link->state == LINK_STATE_CONFIGURED)
1018 return;
1019
1020 if (link->state != LINK_STATE_CONFIGURING) {
1021 log_link_debug(link, "%s(): link is in %s state.", __func__, link_state_to_string(link->state));
6accfd31 1022 return;
39373cb9 1023 }
6accfd31
DA		 1024
1025 if (!link->network)
1026 return;
1027
39373cb9
YW		 1028 if (!link->addresses_configured) {
1029 log_link_debug(link, "%s(): static addresses are not configured.", __func__);
6accfd31 1030 return;
39373cb9 1031 }
6accfd31 1032
39373cb9
YW		 1033 if (!link->neighbors_configured) {
1034 log_link_debug(link, "%s(): static neighbors are not configured.", __func__);
6accfd31 1035 return;
39373cb9 1036 }
6accfd31 1037
90e74a66 1038 SET_FOREACH(a, link->addresses)
39373cb9
YW		 1039 if (!address_is_ready(a)) {
1040 _cleanup_free_ char *str = NULL;
1041
1042 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1043 log_link_debug(link, "%s(): an address %s/%d is not ready.", __func__, strnull(str), a->prefixlen);
6aa5773b 1044 return;
39373cb9 1045 }
6aa5773b 1046
39373cb9
YW		 1047 if (!link->static_routes_configured) {
1048 log_link_debug(link, "%s(): static routes are not configured.", __func__);
6accfd31 1049 return;
39373cb9 1050 }
6accfd31 1051
39373cb9
YW		 1052 if (!link->static_nexthops_configured) {
1053 log_link_debug(link, "%s(): static nexthops are not configured.", __func__);
c16c7808 1054 return;
39373cb9 1055 }
c16c7808 1056
39373cb9
YW		 1057 if (!link->routing_policy_rules_configured) {
1058 log_link_debug(link, "%s(): static routing policy rules are not configured.", __func__);
6accfd31 1059 return;
39373cb9 1060 }
6accfd31 1061
39373cb9
YW		 1062 if (!link->tc_configured) {
1063 log_link_debug(link, "%s(): traffic controls are not configured.", __func__);
4ecdcb07 1064 return;
39373cb9 1065 }
4ecdcb07 1066
39373cb9
YW		 1067 if (!link->sr_iov_configured) {
1068 log_link_debug(link, "%s(): SR-IOV is not configured.", __func__);
518cd6b5 1069 return;
39373cb9 1070 }
518cd6b5 1071
1f241589
YW		 1072 if (!link->bridge_mdb_configured) {
1073 log_link_debug(link, "%s(): Bridge MDB is not configured.", __func__);
1074 return;
1075 }
1076
463797c1 1077 if (link_has_carrier(link) || !link->network->configure_without_carrier) {
50550722
YW		 1078 bool has_ndisc_address = false;
1079 NDiscAddress *n;
6accfd31 1080
1c09d84e 1081 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4) && !link->ipv4ll_address_configured) {
39373cb9 1082 log_link_debug(link, "%s(): IPv4LL is not configured.", __func__);
463797c1 1083 return;
39373cb9 1084 }
6accfd31 1085
463797c1 1086 if (link_ipv6ll_enabled(link) &&
39373cb9
YW		 1087 in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
1088 log_link_debug(link, "%s(): IPv6LL is not configured.", __func__);
463797c1 1089 return;
39373cb9 1090 }
6accfd31 1091
90e74a66 1092 SET_FOREACH(n, link->ndisc_addresses)
50550722
YW		 1093 if (!n->marked) {
1094 has_ndisc_address = true;
1095 break;
1096 }
1097
15797d6a 1098 if ((link_dhcp4_enabled(link) || link_dhcp6_enabled(link)) &&
50550722 1099 !link->dhcp_address && set_isempty(link->dhcp6_addresses) && !has_ndisc_address &&
15797d6a
YW		 1100 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
1101 log_link_debug(link, "%s(): DHCP4 or DHCP6 is enabled but no dynamic address is assigned yet.", __func__);
659ad3a0
YW		 1102 return;
1103 }
1104
1633c457 1105 if (link_dhcp4_enabled(link) || link_dhcp6_enabled(link) || link_dhcp6_pd_is_enabled(link) || link_ipv6_accept_ra_enabled(link)) {
39373cb9
YW		 1106 if (!link->dhcp4_configured &&
1107 !(link->dhcp6_address_configured && link->dhcp6_route_configured) &&
1108 !(link->dhcp6_pd_address_configured && link->dhcp6_pd_route_configured) &&
d98c546d 1109 !(link->ndisc_addresses_configured && link->ndisc_routes_configured) &&
1c09d84e 1110 !(link_ipv4ll_enabled(link, ADDRESS_FAMILY_FALLBACK_IPV4) && link->ipv4ll_address_configured)) {
39373cb9
YW		 1111 /* When DHCP or RA is enabled, at least one protocol must provide an address, or
1112 * an IPv4ll fallback address must be configured. */
1113 log_link_debug(link, "%s(): dynamic addresses or routes are not configured.", __func__);
1114 return;
1115 }
1116
d98c546d 1117 log_link_debug(link, "%s(): dhcp4:%s dhcp6_addresses:%s dhcp_routes:%s dhcp_pd_addresses:%s dhcp_pd_routes:%s ndisc_addresses:%s ndisc_routes:%s",
39373cb9
YW		 1118 __func__,
1119 yes_no(link->dhcp4_configured),
1120 yes_no(link->dhcp6_address_configured),
1121 yes_no(link->dhcp6_route_configured),
1122 yes_no(link->dhcp6_pd_address_configured),
1123 yes_no(link->dhcp6_pd_route_configured),
d98c546d
YW		 1124 yes_no(link->ndisc_addresses_configured),
1125 yes_no(link->ndisc_routes_configured));
39373cb9 1126 }
463797c1 1127 }
6accfd31 1128
5f58af25 1129 link_enter_configured(link);
6accfd31
DA		 1130
1131 return;
1132}
1133
e5526518
YW		 1134static int link_set_bridge_fdb(Link *link) {
1135 FdbEntry *fdb_entry;
1136 int r;
1137
1138 LIST_FOREACH(static_fdb_entries, fdb_entry, link->network->static_fdb_entries) {
1139 r = fdb_entry_configure(link, fdb_entry);
1140 if (r < 0)
1141 return log_link_error_errno(link, r, "Failed to add MAC entry to static MAC table: %m");
1142 }
1143
1144 return 0;
1145}
1146
1147static int static_address_ready_callback(Address *address) {
1148 Address *a;
e5526518
YW		 1149 Link *link;
1150
1151 assert(address);
1152 assert(address->link);
1153
1154 link = address->link;
1155
1156 if (!link->addresses_configured)
1157 return 0;
1158
90e74a66 1159 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1160 if (!address_is_ready(a)) {
1161 _cleanup_free_ char *str = NULL;
1162
1163 (void) in_addr_to_string(a->family, &a->in_addr, &str);
1164 log_link_debug(link, "an address %s/%u is not ready", strnull(str), a->prefixlen);
1165 return 0;
1166 }
1167
1168 /* This should not be called again */
90e74a66 1169 SET_FOREACH(a, link->static_addresses)
e5526518
YW		 1170 a->callback = NULL;
1171
1172 link->addresses_ready = true;
1173
1174 return link_request_set_routes(link);
1175}
1176
3650173f 1177static int address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
f882c247
TG		 1178 int r;
1179
4958aee4 1180 assert(rtnl);
f5be5601
TG		 1181 assert(m);
1182 assert(link);
1183 assert(link->ifname);
7715629e 1184 assert(link->address_messages > 0);
289e6774 1185 assert(IN_SET(link->state, LINK_STATE_CONFIGURING,
370e9930 1186 LINK_STATE_FAILED, LINK_STATE_LINGER));
f882c247 1187
7715629e 1188 link->address_messages--;
f882c247 1189
5da8149f 1190 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
f882c247
TG		 1191 return 1;
1192
1c4baffc 1193 r = sd_netlink_message_get_errno(m);
4ff296b0 1194 if (r < 0 && r != -EEXIST) {
5ecb131d 1195 log_link_message_warning_errno(link, m, r, "Could not set address");
4ff296b0
YW		 1196 link_enter_failed(link);
1197 return 1;
1198 } else if (r >= 0)
1199 (void) manager_rtnl_process_address(rtnl, m, link->manager);
f882c247 1200
7715629e 1201 if (link->address_messages == 0) {
e5526518
YW		 1202 Address *a;
1203
6a7a4e4d 1204 log_link_debug(link, "Addresses set");
c42ff3a1 1205 link->addresses_configured = true;
e5526518
YW		 1206
1207 /* When all static addresses are already ready, then static_address_ready_callback()
1208 * will not be called automatically. So, call it here. */
1209 a = set_first(link->static_addresses);
1210 if (!a) {
1211 log_link_warning(link, "No static address is stored.");
1212 link_enter_failed(link);
1213 return 1;
1214 }
1215 if (!a->callback) {
1216 log_link_warning(link, "Address ready callback is not set.");
1217 link_enter_failed(link);
1218 return 1;
1219 }
1220 r = a->callback(a);
1221 if (r < 0)
1222 link_enter_failed(link);
dd3efc09 1223 }
f882c247
TG		 1224
1225 return 1;
1226}
1227
e5526518
YW		 1228static int static_address_configure(Address *address, Link *link, bool update) {
1229 Address *ret;
197e2809 1230 int r;
f6bb7ac5 1231
e5526518
YW		 1232 assert(address);
1233 assert(link);
1234
1235 r = address_configure(address, link, address_handler, update, &ret);
1236 if (r < 0)
1237 return log_link_warning_errno(link, r, "Could not configure static address: %m");
1238
1239 link->address_messages++;
1240
1241 r = set_ensure_put(&link->static_addresses, &address_hash_ops, ret);
1242 if (r < 0)
1243 return log_link_warning_errno(link, r, "Failed to store static address: %m");
1244
1245 ret->callback = static_address_ready_callback;
f6bb7ac5 1246
197e2809 1247 return 0;
f6bb7ac5
TJ		 1248}
1249
289e6774 1250static int link_request_set_addresses(Link *link) {
95b74ef6 1251 AddressLabel *label;
a6cc569e 1252 Address *ad;
bd6379ec 1253 Prefix *p;
f882c247
TG		 1254 int r;
1255
1256 assert(link);
1257 assert(link->network);
f5be5601 1258 assert(link->state != _LINK_STATE_INVALID);
f882c247 1259
9b966cee
YW		 1260 if (link->address_remove_messages != 0) {
1261 log_link_debug(link, "Removing old addresses, new addresses will be configured later.");
1262 link->request_static_addresses = true;
1263 return 0;
1264 }
1265
2428613f 1266 /* Reset all *_configured flags we are configuring. */
9b966cee 1267 link->request_static_addresses = false;
2428613f 1268 link->addresses_configured = false;
6aa5773b 1269 link->addresses_ready = false;
2428613f
YW		 1270 link->neighbors_configured = false;
1271 link->static_routes_configured = false;
c16c7808 1272 link->static_nexthops_configured = false;
2428613f
YW		 1273 link->routing_policy_rules_configured = false;
1274
f6bb7ac5
TJ		 1275 r = link_set_bridge_fdb(link);
1276 if (r < 0)
1277 return r;
1278
1f241589
YW		 1279 r = link_set_bridge_mdb(link);
1280 if (r < 0)
1281 return r;
1282
58f1fe9a 1283 r = link_set_neighbors(link);
f3ef324d
YW		 1284 if (r < 0)
1285 return r;
e4a71bf3 1286
3d3d4255 1287 LIST_FOREACH(addresses, ad, link->network->static_addresses) {
a47a6dae
YW		 1288 bool update;
1289
6f5d73ab
YW		 1290 if (ad->family == AF_INET6 && !in_addr_is_null(ad->family, &ad->in_addr_peer))
1291 update = address_get(link, ad->family, &ad->in_addr_peer, ad->prefixlen, NULL) > 0;
1292 else
1293 update = address_get(link, ad->family, &ad->in_addr, ad->prefixlen, NULL) > 0;
a47a6dae 1294
e5526518 1295 r = static_address_configure(ad, link, update);
4ff296b0 1296 if (r < 0)
e5526518 1297 return r;
95b74ef6
SS		 1298 }
1299
61c0ef4f 1300 if (link->network->router_prefix_delegation & RADV_PREFIX_DELEGATION_STATIC)
bd6379ec
SS		 1301 LIST_FOREACH(prefixes, p, link->network->static_prefixes) {
1302 _cleanup_(address_freep) Address *address = NULL;
1303
1304 if (!p->assign)
1305 continue;
1306
1307 r = address_new(&address);
1308 if (r < 0)
e5526518 1309 return log_oom();
bd6379ec
SS		 1310
1311 r = sd_radv_prefix_get_prefix(p->radv_prefix, &address->in_addr.in6, &address->prefixlen);
1312 if (r < 0)
e5526518 1313 return log_link_warning_errno(link, r, "Could not get RA prefix: %m");
bd6379ec
SS		 1314
1315 r = generate_ipv6_eui_64_address(link, &address->in_addr.in6);
1316 if (r < 0)
e5526518 1317 return log_link_warning_errno(link, r, "Could not generate EUI64 address: %m");
bd6379ec
SS		 1318
1319 address->family = AF_INET6;
e5526518 1320 r = static_address_configure(address, link, true);
bd6379ec 1321 if (r < 0)
e5526518 1322 return r;
bd6379ec
SS		 1323 }
1324
d6a2a0f9 1325 HASHMAP_FOREACH(label, link->network->address_labels_by_section) {
cccf9517 1326 r = address_label_configure(label, link, NULL, false);
4ff296b0
YW		 1327 if (r < 0)
1328 return log_link_warning_errno(link, r, "Could not set address label: %m");
f5be5601 1329
7715629e 1330 link->address_label_messages++;
f882c247
TG		 1331 }
1332
e5526518 1333 /* now that we can figure out a default address for the dhcp server, start it */
708c425d 1334 if (link_dhcp4_server_enabled(link) && (link->flags & IFF_UP)) {
8fcf1d61 1335 r = dhcp4_server_configure(link);
4ff296b0 1336 if (r < 0)
d4cdbea5 1337 return r;
6a7a4e4d 1338 log_link_debug(link, "Offering DHCPv4 leases");
d4cdbea5
TG		 1339 }
1340
c42ff3a1
WKI		 1341 if (link->address_messages == 0) {
1342 link->addresses_configured = true;
e5526518
YW		 1343 link->addresses_ready = true;
1344 r = link_request_set_routes(link);
1345 if (r < 0)
1346 return r;
b425c3ae 1347 } else {
6a7a4e4d 1348 log_link_debug(link, "Setting addresses");
b425c3ae
YW		 1349 link_set_state(link, LINK_STATE_CONFIGURING);
1350 }
431ca2ce 1351
f882c247
TG		 1352 return 0;
1353}
1354
13b498f9 1355static int link_set_bridge_vlan(Link *link) {
86e2be7b 1356 int r;
13b498f9
TJ		 1357
1358 r = br_vlan_configure(link, link->network->pvid, link->network->br_vid_bitmap, link->network->br_untagged_bitmap);
1359 if (r < 0)
1360 log_link_error_errno(link, r, "Failed to assign VLANs to bridge port: %m");
1361
1362 return r;
1363}
1364
a60a720c 1365static int link_set_proxy_arp(Link *link) {
23d8b221
SS		 1366 int r;
1367
1368 if (!link_proxy_arp_enabled(link))
1369 return 0;
1370
62e021a9 1371 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "proxy_arp", link->network->proxy_arp > 0);
23d8b221
SS		 1372 if (r < 0)
1373 log_link_warning_errno(link, r, "Cannot configure proxy ARP for interface: %m");
1374
1375 return 0;
1376}
1377
3a390124 1378static int link_configure_continue(Link *link);
55dc8c4a 1379
302a796f 1380static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
4f882b2a
TG		 1381 int r;
1382
1383 assert(m);
1384 assert(link);
1385 assert(link->ifname);
1386
55dc8c4a
YW		 1387 link->setting_mtu = false;
1388
5da8149f 1389 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
4f882b2a
TG		 1390 return 1;
1391
1c4baffc 1392 r = sd_netlink_message_get_errno(m);
4ff296b0 1393 if (r < 0)
5ecb131d 1394 log_link_message_warning_errno(link, m, r, "Could not set MTU, ignoring");
4ff296b0
YW		 1395 else
1396 log_link_debug(link, "Setting MTU done.");
55dc8c4a 1397
4ff296b0 1398 if (link->state == LINK_STATE_INITIALIZED) {
3a390124 1399 r = link_configure_continue(link);
4ff296b0
YW		 1400 if (r < 0)
1401 link_enter_failed(link);
1402 }
4f882b2a
TG		 1403
1404 return 1;
1405}
1406
933c70a0 1407int link_set_mtu(Link *link, uint32_t mtu) {
4afd3348 1408 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f882b2a
TG		 1409 int r;
1410
1411 assert(link);
1412 assert(link->manager);
1413 assert(link->manager->rtnl);
1414
40288ece
YW		 1415 if (mtu == 0 || link->setting_mtu)
1416 return 0;
1417
933c70a0 1418 if (link->mtu == mtu)
ee493106
YW		 1419 return 0;
1420
6a7a4e4d 1421 log_link_debug(link, "Setting MTU: %" PRIu32, mtu);
4f882b2a 1422
6a7a4e4d
LP		 1423 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1424 if (r < 0)
1425 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
4f882b2a 1426
44b598a1 1427 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
72c2500b
YW		 1428 * on the interface. Bump up MTU bytes to IPV6_MTU_MIN. */
1429 if (link_ipv6_enabled(link) && mtu < IPV6_MIN_MTU) {
44b598a1
SS		 1430
1431 log_link_warning(link, "Bumping MTU to " STRINGIFY(IPV6_MIN_MTU) ", as "
d236718c 1432 "IPv6 is requested and requires a minimum MTU of " STRINGIFY(IPV6_MIN_MTU) " bytes");
44b598a1 1433
72c2500b 1434 mtu = IPV6_MIN_MTU;
44b598a1
SS		 1435 }
1436
1c4baffc 1437 r = sd_netlink_message_append_u32(req, IFLA_MTU, mtu);
6a7a4e4d
LP		 1438 if (r < 0)
1439 return log_link_error_errno(link, r, "Could not append MTU: %m");
4f882b2a 1440
302a796f
YW		 1441 r = netlink_call_async(link->manager->rtnl, NULL, req, set_mtu_handler,
1442 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1443 if (r < 0)
1444 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
4f882b2a 1445
ae941762 1446 link_ref(link);
1046bf9b 1447 link->setting_mtu = true;
b226d99b 1448
4f882b2a
TG		 1449 return 0;
1450}
1451
f6fcc1c2
YW		 1452static bool link_reduces_vlan_mtu(Link *link) {
1453 /* See netif_reduces_vlan_mtu() in kernel. */
1454 return streq_ptr(link->kind, "macsec");
1455}
1456
1457static uint32_t link_get_requested_mtu_by_stacked_netdevs(Link *link) {
1458 uint32_t mtu = 0;
1459 NetDev *dev;
f6fcc1c2 1460
90e74a66 1461 HASHMAP_FOREACH(dev, link->network->stacked_netdevs)
f6fcc1c2
YW		 1462 if (dev->kind == NETDEV_KIND_VLAN && dev->mtu > 0)
1463 /* See vlan_dev_change_mtu() in kernel. */
1464 mtu = MAX(mtu, link_reduces_vlan_mtu(link) ? dev->mtu + 4 : dev->mtu);
1465
1466 else if (dev->kind == NETDEV_KIND_MACVLAN && dev->mtu > mtu)
1467 /* See macvlan_change_mtu() in kernel. */
1468 mtu = dev->mtu;
1469
1470 return mtu;
1471}
1472
1473static int link_configure_mtu(Link *link) {
1474 uint32_t mtu;
1475
1476 assert(link);
1477 assert(link->network);
1478
1479 if (link->network->mtu > 0)
1480 return link_set_mtu(link, link->network->mtu);
1481
1482 mtu = link_get_requested_mtu_by_stacked_netdevs(link);
1483 if (link->mtu >= mtu)
1484 return 0;
1485
1486 log_link_notice(link, "Bumping MTU bytes from %"PRIu32" to %"PRIu32" because of stacked device. "
1487 "If it is not desired, then please explicitly specify MTUBytes= setting.",
1488 link->mtu, mtu);
1489
1490 return link_set_mtu(link, mtu);
1491}
1492
302a796f 1493static int set_flags_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
99d2baa2
SS		 1494 int r;
1495
1496 assert(m);
1497 assert(link);
1498 assert(link->ifname);
1499
1500 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1501 return 1;
1502
1503 r = sd_netlink_message_get_errno(m);
1504 if (r < 0)
5ecb131d 1505 log_link_message_warning_errno(link, m, r, "Could not set link flags, ignoring");
99d2baa2
SS		 1506
1507 return 1;
1508}
1509
1510static int link_set_flags(Link *link) {
1511 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1512 unsigned ifi_change = 0;
1513 unsigned ifi_flags = 0;
1514 int r;
1515
1516 assert(link);
1517 assert(link->manager);
1518 assert(link->manager->rtnl);
1519
1520 if (link->flags & IFF_LOOPBACK)
1521 return 0;
1522
1523 if (!link->network)
1524 return 0;
1525
866e6b7a 1526 if (link->network->arp < 0 && link->network->multicast < 0 && link->network->allmulticast < 0)
99d2baa2
SS		 1527 return 0;
1528
1529 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1530 if (r < 0)
1531 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1532
1533 if (link->network->arp >= 0) {
1534 ifi_change |= IFF_NOARP;
e6ebebbe
SS		 1535 SET_FLAG(ifi_flags, IFF_NOARP, link->network->arp == 0);
1536 }
1537
1538 if (link->network->multicast >= 0) {
1539 ifi_change |= IFF_MULTICAST;
1540 SET_FLAG(ifi_flags, IFF_MULTICAST, link->network->multicast);
99d2baa2
SS		 1541 }
1542
866e6b7a
SS		 1543 if (link->network->allmulticast >= 0) {
1544 ifi_change |= IFF_ALLMULTI;
1545 SET_FLAG(ifi_flags, IFF_ALLMULTI, link->network->allmulticast);
1546 }
1547
99d2baa2
SS		 1548 r = sd_rtnl_message_link_set_flags(req, ifi_flags, ifi_change);
1549 if (r < 0)
1550 return log_link_error_errno(link, r, "Could not set link flags: %m");
1551
302a796f
YW		 1552 r = netlink_call_async(link->manager->rtnl, NULL, req, set_flags_handler,
1553 link_netlink_destroy_callback, link);
99d2baa2
SS		 1554 if (r < 0)
1555 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1556
1557 link_ref(link);
1558
1559 return 0;
1560}
1561
e7ab854c
TG		 1562static int link_acquire_ipv6_conf(Link *link) {
1563 int r;
1564
1565 assert(link);
1566
e7ab854c 1567 if (link_ipv6_accept_ra_enabled(link)) {
1e7a0e21 1568 assert(link->ndisc);
e7ab854c
TG		 1569
1570 log_link_debug(link, "Discovering IPv6 routers");
1571
1e7a0e21 1572 r = sd_ndisc_start(link->ndisc);
63348d13 1573 if (r < 0 && r != -EBUSY)
e7ab854c
TG		 1574 return log_link_warning_errno(link, r, "Could not start IPv6 Router Discovery: %m");
1575 }
1576
7465dd22
PF		 1577 if (link_radv_enabled(link)) {
1578 assert(link->radv);
1579 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1580
1581 log_link_debug(link, "Starting IPv6 Router Advertisements");
1582
fd3ef936
YW		 1583 r = radv_emit_dns(link);
1584 if (r < 0)
1585 return log_link_warning_errno(link, r, "Failed to configure DNS or Domains in IPv6 Router Advertisement: %m");
1586
7465dd22
PF		 1587 r = sd_radv_start(link->radv);
1588 if (r < 0 && r != -EBUSY)
1589 return log_link_warning_errno(link, r, "Could not start IPv6 Router Advertisement: %m");
1590 }
1591
838d39af
SS		 1592 if (link_dhcp6_enabled(link) && IN_SET(link->network->dhcp6_without_ra,
1593 DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST,
1594 DHCP6_CLIENT_START_MODE_SOLICIT)) {
cd305af1
SS		 1595 assert(link->dhcp6_client);
1596 assert(in_addr_is_link_local(AF_INET6, (const union in_addr_union*)&link->ipv6ll_address) > 0);
1597
838d39af 1598 r = dhcp6_request_address(link, link->network->dhcp6_without_ra == DHCP6_CLIENT_START_MODE_INFORMATION_REQUEST);
cd305af1 1599 if (r < 0 && r != -EBUSY)
1633c457 1600 return log_link_warning_errno(link, r, "Could not acquire DHCPv6 lease: %m");
cd305af1
SS		 1601 else
1602 log_link_debug(link, "Acquiring DHCPv6 lease");
1603 }
1604
1633c457
YW		 1605 r = dhcp6_request_prefix_delegation(link);
1606 if (r < 0)
1607 return log_link_warning_errno(link, r, "Failed to request DHCPv6 prefix delegation: %m");
10752343 1608
e7ab854c
TG		 1609 return 0;
1610}
1611
6fc25497 1612static int link_acquire_ipv4_conf(Link *link) {
ff254138
TG		 1613 int r;
1614
1615 assert(link);
ff254138
TG		 1616 assert(link->manager);
1617 assert(link->manager->event);
1618
910feb78 1619 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4)) {
eb34d4af 1620 assert(link->ipv4ll);
ff254138 1621
6a7a4e4d 1622 log_link_debug(link, "Acquiring IPv4 link-local address");
5c1d3fc9
UTL		 1623
1624 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d
LP		 1625 if (r < 0)
1626 return log_link_warning_errno(link, r, "Could not acquire IPv4 link-local address: %m");
5c1d3fc9
UTL		 1627 }
1628
78c958f8 1629 if (link_dhcp4_enabled(link)) {
eb34d4af 1630 assert(link->dhcp_client);
ff254138 1631
6a7a4e4d 1632 log_link_debug(link, "Acquiring DHCPv4 lease");
ab47d620 1633
5c1d3fc9 1634 r = sd_dhcp_client_start(link->dhcp_client);
6a7a4e4d
LP		 1635 if (r < 0)
1636 return log_link_warning_errno(link, r, "Could not acquire DHCPv4 lease: %m");
5c1d3fc9 1637 }
ff254138 1638
6fc25497
SS		 1639 return 0;
1640}
1641
1642static int link_acquire_conf(Link *link) {
1643 int r;
1644
1645 assert(link);
1646
1647 r = link_acquire_ipv4_conf(link);
1648 if (r < 0)
1649 return r;
1650
3f7cc080 1651 if (!in_addr_is_null(AF_INET6, (const union in_addr_union*) &link->ipv6ll_address)) {
6fc25497
SS		 1652 r = link_acquire_ipv6_conf(link);
1653 if (r < 0)
1654 return r;
1655 }
1656
7272b25e
LP		 1657 if (link_lldp_emit_enabled(link)) {
1658 r = link_lldp_emit_start(link);
8e1ad1ea
LP		 1659 if (r < 0)
1660 return log_link_warning_errno(link, r, "Failed to start LLDP transmission: %m");
1661 }
1662
ff254138
TG		 1663 return 0;
1664}
1665
a61bb41c 1666bool link_has_carrier(Link *link) {
deb2e523
TG		 1667 /* see Documentation/networking/operstates.txt in the kernel sources */
1668
a61bb41c 1669 if (link->kernel_operstate == IF_OPER_UP)
deb2e523
TG		 1670 return true;
1671
a61bb41c 1672 if (link->kernel_operstate == IF_OPER_UNKNOWN)
deb2e523 1673 /* operstate may not be implemented, so fall back to flags */
b26ea308
YW		 1674 if (FLAGS_SET(link->flags, IFF_LOWER_UP | IFF_RUNNING) &&
1675 !FLAGS_SET(link->flags, IFF_DORMANT))
deb2e523
TG		 1676 return true;
1677
1678 return false;
1679}
1680
0e2fdb83
SS		 1681static int link_address_genmode_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1682 int r;
1683
1684 assert(link);
1685
9524014e
DS		 1686 link->setting_genmode = false;
1687
0e2fdb83
SS		 1688 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1689 return 1;
1690
1691 r = sd_netlink_message_get_errno(m);
1692 if (r < 0)
5ecb131d 1693 log_link_message_warning_errno(link, m, r, "Could not set address genmode for interface, ignoring");
9524014e
DS		 1694 else
1695 log_link_debug(link, "Setting address genmode done.");
1696
1697 if (link->state == LINK_STATE_INITIALIZED) {
1698 r = link_configure_continue(link);
1699 if (r < 0)
1700 link_enter_failed(link);
1701 }
0e2fdb83
SS		 1702
1703 return 1;
1704}
1705
1706static int link_configure_addrgen_mode(Link *link) {
1707 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1708 uint8_t ipv6ll_mode;
1709 int r;
1710
1711 assert(link);
1712 assert(link->network);
1713 assert(link->manager);
1714 assert(link->manager->rtnl);
1715
9524014e 1716 if (!socket_ipv6_is_supported() || link->setting_genmode)
9f6e82e6
YW		 1717 return 0;
1718
0e2fdb83
SS		 1719 log_link_debug(link, "Setting address genmode for link");
1720
1721 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1722 if (r < 0)
1723 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1724
1725 r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
1726 if (r < 0)
1727 return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
1728
1729 r = sd_netlink_message_open_container(req, AF_INET6);
1730 if (r < 0)
1731 return log_link_error_errno(link, r, "Could not open AF_INET6 container: %m");
1732
1733 if (!link_ipv6ll_enabled(link))
1734 ipv6ll_mode = IN6_ADDR_GEN_MODE_NONE;
6f6296b9 1735 else if (link->network->ipv6ll_address_gen_mode < 0) {
a6f1848a
SS		 1736 r = sysctl_read_ip_property(AF_INET6, link->ifname, "stable_secret", NULL);
1737 if (r < 0) {
1738 /* The file may not exist. And even if it exists, when stable_secret is unset,
1739 * reading the file fails with EIO. */
1740 log_link_debug_errno(link, r, "Failed to read sysctl property stable_secret: %m");
1741
1742 ipv6ll_mode = IN6_ADDR_GEN_MODE_EUI64;
1743 } else
1744 ipv6ll_mode = IN6_ADDR_GEN_MODE_STABLE_PRIVACY;
1745 } else
6f6296b9 1746 ipv6ll_mode = link->network->ipv6ll_address_gen_mode;
0e2fdb83
SS		 1747
1748 r = sd_netlink_message_append_u8(req, IFLA_INET6_ADDR_GEN_MODE, ipv6ll_mode);
1749 if (r < 0)
1750 return log_link_error_errno(link, r, "Could not append IFLA_INET6_ADDR_GEN_MODE: %m");
1751
1752 r = sd_netlink_message_close_container(req);
1753 if (r < 0)
1754 return log_link_error_errno(link, r, "Could not close AF_INET6 container: %m");
1755
1756 r = sd_netlink_message_close_container(req);
1757 if (r < 0)
1758 return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
1759
1760 r = netlink_call_async(link->manager->rtnl, NULL, req, link_address_genmode_handler,
1761 link_netlink_destroy_callback, link);
1762 if (r < 0)
1763 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1764
1765 link_ref(link);
9524014e 1766 link->setting_genmode = true;
0e2fdb83
SS		 1767
1768 return 0;
1769}
1770
302a796f 1771static int link_up_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
dd3efc09
TG		 1772 int r;
1773
1746cf2a
TG		 1774 assert(link);
1775
5da8149f 1776 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1746cf2a
TG		 1777 return 1;
1778
1c4baffc 1779 r = sd_netlink_message_get_errno(m);
6a7a4e4d 1780 if (r < 0)
26d6b214 1781 /* we warn but don't fail the link, as it may be brought up later */
5ecb131d 1782 log_link_message_warning_errno(link, m, r, "Could not bring up interface");
45ad2c13 1783
f882c247
TG		 1784 return 1;
1785}
1786
1cc84f3b 1787static int link_up(Link *link) {
4afd3348 1788 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
f579559b
TG		 1789 int r;
1790
f882c247 1791 assert(link);
c106cc36 1792 assert(link->network);
f882c247
TG		 1793 assert(link->manager);
1794 assert(link->manager->rtnl);
1795
6a7a4e4d 1796 log_link_debug(link, "Bringing link up");
449f7554 1797
6a7a4e4d
LP		 1798 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1799 if (r < 0)
1800 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
f579559b 1801
2b2d8603 1802 /* set it free if not enslaved with networkd */
6cb955c6 1803 if (!link->network->bridge && !link->network->bond && !link->network->vrf) {
2b2d8603
TY		 1804 r = sd_netlink_message_append_u32(req, IFLA_MASTER, 0);
1805 if (r < 0)
1806 return log_link_error_errno(link, r, "Could not append IFLA_MASTER attribute: %m");
1807 }
1808
5d4795f3 1809 r = sd_rtnl_message_link_set_flags(req, IFF_UP, IFF_UP);
6a7a4e4d
LP		 1810 if (r < 0)
1811 return log_link_error_errno(link, r, "Could not set link flags: %m");
fc25d7f8 1812
c106cc36 1813 if (link->network->mac) {
1c4baffc 1814 r = sd_netlink_message_append_ether_addr(req, IFLA_ADDRESS, link->network->mac);
6a7a4e4d
LP		 1815 if (r < 0)
1816 return log_link_error_errno(link, r, "Could not set MAC address: %m");
c106cc36
TG		 1817 }
1818
302a796f
YW		 1819 r = netlink_call_async(link->manager->rtnl, NULL, req, link_up_handler,
1820 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1821 if (r < 0)
1822 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
f579559b 1823
b226d99b
TG		 1824 link_ref(link);
1825
f882c247
TG		 1826 return 0;
1827}
1828
302a796f 1829static int link_down_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
0d4ad91d
AR		 1830 int r;
1831
1832 assert(link);
1833
1834 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1835 return 1;
1836
1c4baffc 1837 r = sd_netlink_message_get_errno(m);
0d4ad91d 1838 if (r < 0)
5ecb131d 1839 log_link_message_warning_errno(link, m, r, "Could not bring down interface");
0d4ad91d
AR		 1840
1841 return 1;
1842}
1843
8e54db83 1844int link_down(Link *link, link_netlink_message_handler_t callback) {
4afd3348 1845 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
0d4ad91d
AR		 1846 int r;
1847
1848 assert(link);
1849 assert(link->manager);
1850 assert(link->manager->rtnl);
1851
6a7a4e4d 1852 log_link_debug(link, "Bringing link down");
0d4ad91d
AR		 1853
1854 r = sd_rtnl_message_new_link(link->manager->rtnl, &req,
1855 RTM_SETLINK, link->ifindex);
6a7a4e4d
LP		 1856 if (r < 0)
1857 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
0d4ad91d
AR		 1858
1859 r = sd_rtnl_message_link_set_flags(req, 0, IFF_UP);
6a7a4e4d
LP		 1860 if (r < 0)
1861 return log_link_error_errno(link, r, "Could not set link flags: %m");
0d4ad91d 1862
8e54db83
YW		 1863 r = netlink_call_async(link->manager->rtnl, NULL, req,
1864 callback ?: link_down_handler,
302a796f 1865 link_netlink_destroy_callback, link);
6a7a4e4d
LP		 1866 if (r < 0)
1867 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
0d4ad91d
AR		 1868
1869 link_ref(link);
1870
1871 return 0;
1872}
1873
89fe6535
SS		 1874static int link_group_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
1875 int r;
1876
1877 assert(link);
1878
1879 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
1880 return 1;
1881
1882 r = sd_netlink_message_get_errno(m);
1883 if (r < 0)
1884 log_link_message_warning_errno(link, m, r, "Could not set group for the interface");
1885
1886 return 1;
1887}
1888
1889static int link_set_group(Link *link) {
1890 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
1891 int r;
1892
1893 assert(link);
1894 assert(link->network);
1895 assert(link->manager);
1896 assert(link->manager->rtnl);
1897
1898 if (link->network->group <= 0)
1899 return 0;
1900
1901 log_link_debug(link, "Setting group");
1902
1903 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_SETLINK, link->ifindex);
1904 if (r < 0)
1905 return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
1906
1907 r = sd_netlink_message_append_u32(req, IFLA_GROUP, link->network->group);
1908 if (r < 0)
1909 return log_link_error_errno(link, r, "Could not set link group: %m");
1910
1911 r = netlink_call_async(link->manager->rtnl, NULL, req, link_group_handler,
1912 link_netlink_destroy_callback, link);
1913 if (r < 0)
1914 return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
1915
1916 link_ref(link);
1917
1918 return 0;
1919}
1920
0d4ad91d
AR		 1921static int link_handle_bound_to_list(Link *link) {
1922 Link *l;
0d4ad91d
AR		 1923 int r;
1924 bool required_up = false;
1925 bool link_is_up = false;
1926
1927 assert(link);
1928
1929 if (hashmap_isempty(link->bound_to_links))
1930 return 0;
1931
1932 if (link->flags & IFF_UP)
1933 link_is_up = true;
1934
90e74a66 1935 HASHMAP_FOREACH (l, link->bound_to_links)
0d4ad91d
AR		 1936 if (link_has_carrier(l)) {
1937 required_up = true;
1938 break;
1939 }
1940
1941 if (!required_up && link_is_up) {
8e54db83 1942 r = link_down(link, NULL);
0d4ad91d
AR		 1943 if (r < 0)
1944 return r;
1945 } else if (required_up && !link_is_up) {
1946 r = link_up(link);
1947 if (r < 0)
1948 return r;
1949 }
1950
1951 return 0;
1952}
1953
1954static int link_handle_bound_by_list(Link *link) {
0d4ad91d
AR		 1955 Link *l;
1956 int r;
1957
1958 assert(link);
1959
1960 if (hashmap_isempty(link->bound_by_links))
1961 return 0;
1962
90e74a66 1963 HASHMAP_FOREACH (l, link->bound_by_links) {
0d4ad91d
AR		 1964 r = link_handle_bound_to_list(l);
1965 if (r < 0)
1966 return r;
1967 }
1968
1969 return 0;
1970}
1971
1972static int link_put_carrier(Link *link, Link *carrier, Hashmap **h) {
1973 int r;
1974
1975 assert(link);
1976 assert(carrier);
1977
1978 if (link == carrier)
1979 return 0;
1980
1981 if (hashmap_get(*h, INT_TO_PTR(carrier->ifindex)))
1982 return 0;
1983
1984 r = hashmap_ensure_allocated(h, NULL);
1985 if (r < 0)
1986 return r;
1987
1988 r = hashmap_put(*h, INT_TO_PTR(carrier->ifindex), carrier);
1989 if (r < 0)
1990 return r;
1991
1992 return 0;
1993}
1994
1995static int link_new_bound_by_list(Link *link) {
1996 Manager *m;
1997 Link *carrier;
0d4ad91d
AR		 1998 int r;
1999 bool list_updated = false;
2000
2001 assert(link);
2002 assert(link->manager);
2003
2004 m = link->manager;
2005
90e74a66 2006 HASHMAP_FOREACH(carrier, m->links) {
0d4ad91d
AR		 2007 if (!carrier->network)
2008 continue;
2009
2010 if (strv_isempty(carrier->network->bind_carrier))
2011 continue;
2012
191a3f16 2013 if (strv_fnmatch(carrier->network->bind_carrier, link->ifname)) {
0d4ad91d
AR		 2014 r = link_put_carrier(link, carrier, &link->bound_by_links);
2015 if (r < 0)
2016 return r;
2017
2018 list_updated = true;
2019 }
2020 }
2021
2022 if (list_updated)
84de38c5 2023 link_dirty(link);
0d4ad91d 2024
90e74a66 2025 HASHMAP_FOREACH(carrier, link->bound_by_links) {
0d4ad91d
AR		 2026 r = link_put_carrier(carrier, link, &carrier->bound_to_links);
2027 if (r < 0)
2028 return r;
2029
84de38c5 2030 link_dirty(carrier);
0d4ad91d
AR		 2031 }
2032
2033 return 0;
2034}
2035
2036static int link_new_bound_to_list(Link *link) {
2037 Manager *m;
2038 Link *carrier;
0d4ad91d
AR		 2039 int r;
2040 bool list_updated = false;
2041
2042 assert(link);
2043 assert(link->manager);
2044
2045 if (!link->network)
2046 return 0;
2047
2048 if (strv_isempty(link->network->bind_carrier))
2049 return 0;
2050
2051 m = link->manager;
2052
90e74a66 2053 HASHMAP_FOREACH (carrier, m->links) {
191a3f16 2054 if (strv_fnmatch(link->network->bind_carrier, carrier->ifname)) {
0d4ad91d
AR		 2055 r = link_put_carrier(link, carrier, &link->bound_to_links);
2056 if (r < 0)
2057 return r;
2058
2059 list_updated = true;
2060 }
2061 }
2062
2063 if (list_updated)
84de38c5 2064 link_dirty(link);
0d4ad91d 2065
90e74a66 2066 HASHMAP_FOREACH (carrier, link->bound_to_links) {
0d4ad91d
AR		 2067 r = link_put_carrier(carrier, link, &carrier->bound_by_links);
2068 if (r < 0)
2069 return r;
2070
84de38c5 2071 link_dirty(carrier);
0d4ad91d
AR		 2072 }
2073
2074 return 0;
2075}
2076
2077static int link_new_carrier_maps(Link *link) {
2078 int r;
2079
2080 r = link_new_bound_by_list(link);
2081 if (r < 0)
2082 return r;
2083
2084 r = link_handle_bound_by_list(link);
2085 if (r < 0)
2086 return r;
2087
2088 r = link_new_bound_to_list(link);
2089 if (r < 0)
2090 return r;
2091
2092 r = link_handle_bound_to_list(link);
2093 if (r < 0)
2094 return r;
2095
2096 return 0;
2097}
2098
2099static void link_free_bound_to_list(Link *link) {
2100 Link *bound_to;
0d4ad91d 2101
90e74a66 2102 HASHMAP_FOREACH (bound_to, link->bound_to_links) {
0d4ad91d
AR		 2103 hashmap_remove(link->bound_to_links, INT_TO_PTR(bound_to->ifindex));
2104
2105 if (hashmap_remove(bound_to->bound_by_links, INT_TO_PTR(link->ifindex)))
84de38c5 2106 link_dirty(bound_to);
0d4ad91d
AR		 2107 }
2108
2109 return;
2110}
2111
2112static void link_free_bound_by_list(Link *link) {
2113 Link *bound_by;
0d4ad91d 2114
90e74a66 2115 HASHMAP_FOREACH (bound_by, link->bound_by_links) {
0d4ad91d
AR		 2116 hashmap_remove(link->bound_by_links, INT_TO_PTR(bound_by->ifindex));
2117
2118 if (hashmap_remove(bound_by->bound_to_links, INT_TO_PTR(link->ifindex))) {
84de38c5 2119 link_dirty(bound_by);
0d4ad91d
AR		 2120 link_handle_bound_to_list(bound_by);
2121 }
2122 }
2123
2124 return;
2125}
2126
2127static void link_free_carrier_maps(Link *link) {
2128 bool list_updated = false;
2129
2130 assert(link);
2131
2132 if (!hashmap_isempty(link->bound_to_links)) {
2133 link_free_bound_to_list(link);
2134 list_updated = true;
2135 }
2136
2137 if (!hashmap_isempty(link->bound_by_links)) {
2138 link_free_bound_by_list(link);
2139 list_updated = true;
2140 }
2141
2142 if (list_updated)
84de38c5 2143 link_dirty(link);
0d4ad91d
AR		 2144
2145 return;
2146}
2147
5f707e12
YW		 2148static int link_append_to_master(Link *link, NetDev *netdev) {
2149 Link *master;
2150 int r;
2151
2152 assert(link);
2153 assert(netdev);
2154
2155 r = link_get(link->manager, netdev->ifindex, &master);
2156 if (r < 0)
2157 return r;
2158
de7fef4b 2159 r = set_ensure_put(&master->slaves, NULL, link);
38288f0b 2160 if (r <= 0)
5f707e12
YW		 2161 return r;
2162
2163 link_ref(link);
2164 return 0;
2165}
2166
2167static void link_drop_from_master(Link *link, NetDev *netdev) {
2168 Link *master;
2169
2170 assert(link);
2171
2172 if (!link->manager || !netdev)
2173 return;
2174
2175 if (link_get(link->manager, netdev->ifindex, &master) < 0)
2176 return;
2177
2178 link_unref(set_remove(master->slaves, link));
2179}
2180
2181static void link_detach_from_manager(Link *link) {
2182 if (!link || !link->manager)
2183 return;
2184
2185 link_unref(set_remove(link->manager->links_requesting_uuid, link));
2186 link_clean(link);
2187
2188 /* The following must be called at last. */
2189 assert_se(hashmap_remove(link->manager->links, INT_TO_PTR(link->ifindex)) == link);
2190 link_unref(link);
2191}
2192
0d4ad91d
AR		 2193void link_drop(Link *link) {
2194 if (!link || link->state == LINK_STATE_LINGER)
2195 return;
2196
2197 link_set_state(link, LINK_STATE_LINGER);
2198
2199 link_free_carrier_maps(link);
2200
5f707e12
YW		 2201 if (link->network) {
2202 link_drop_from_master(link, link->network->bridge);
2203 link_drop_from_master(link, link->network->bond);
2204 }
2205
6a7a4e4d 2206 log_link_debug(link, "Link removed");
0d4ad91d 2207
db2f8a2e 2208 (void) unlink(link->state_file);
c4397d94 2209 link_detach_from_manager(link);
0d4ad91d
AR		 2210}
2211
3f265037 2212static int link_joined(Link *link) {
f882c247
TG		 2213 int r;
2214
ef1ba606 2215 assert(link);
f5be5601 2216 assert(link->network);
dd3efc09 2217
0d4ad91d
AR		 2218 if (!hashmap_isempty(link->bound_to_links)) {
2219 r = link_handle_bound_to_list(link);
2220 if (r < 0)
2221 return r;
2222 } else if (!(link->flags & IFF_UP)) {
505f8da7
TG		 2223 r = link_up(link);
2224 if (r < 0) {
2225 link_enter_failed(link);
2226 return r;
2227 }
ef1ba606 2228 }
f882c247 2229
9ed794a3 2230 if (link->network->bridge) {
e1853b00 2231 r = link_set_bridge(link);
6a7a4e4d
LP		 2232 if (r < 0)
2233 log_link_error_errno(link, r, "Could not set bridge message: %m");
45e11abf
YW		 2234
2235 r = link_append_to_master(link, link->network->bridge);
2236 if (r < 0)
2237 log_link_error_errno(link, r, "Failed to add to bridge master's slave list: %m");
e1853b00
SS		 2238 }
2239
eb64b435 2240 if (link->network->bond) {
7fcee284 2241 r = link_set_bond(link);
eb64b435
SS		 2242 if (r < 0)
2243 log_link_error_errno(link, r, "Could not set bond message: %m");
959f65d3 2244
45e11abf 2245 r = link_append_to_master(link, link->network->bond);
959f65d3
YW		 2246 if (r < 0)
2247 log_link_error_errno(link, r, "Failed to add to bond master's slave list: %m");
eb64b435
SS		 2248 }
2249
ffff9abe
TJ		 2250 if (link->network->use_br_vlan &&
2251 (link->network->bridge || streq_ptr("bridge", link->kind))) {
13b498f9
TJ		 2252 r = link_set_bridge_vlan(link);
2253 if (r < 0)
2254 log_link_error_errno(link, r, "Could not set bridge vlan: %m");
2255 }
2256
c1835a42
RM		 2257 /* Skip setting up addresses until it gets carrier,
2258 or it would try to set addresses twice,
2259 which is bad for non-idempotent steps. */
dad2d78e 2260 if (!link_has_carrier(link) && !link->network->configure_without_carrier)
c1835a42
RM		 2261 return 0;
2262
b425c3ae 2263 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 2264 return link_request_set_addresses(link);
02b59d57
TG		 2265}
2266
302a796f 2267static int netdev_join_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
02b59d57
TG		 2268 int r;
2269
1746cf2a 2270 assert(link);
ef1ba606 2271 assert(link->network);
34bf3c00 2272 assert(link->enslaving > 0);
02b59d57 2273
313cefa1 2274 link->enslaving--;
52433f6b 2275
5da8149f 2276 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
02b59d57
TG		 2277 return 1;
2278
1c4baffc 2279 r = sd_netlink_message_get_errno(m);
856f962c 2280 if (r < 0 && r != -EEXIST) {
5ecb131d 2281 log_link_message_warning_errno(link, m, r, "Could not join netdev");
ef1ba606
TG		 2282 link_enter_failed(link);
2283 return 1;
4ff296b0
YW		 2284 }
2285
2286 log_link_debug(link, "Joined netdev");
02b59d57 2287
34bf3c00 2288 if (link->enslaving == 0) {
4ff296b0
YW		 2289 r = link_joined(link);
2290 if (r < 0)
2291 link_enter_failed(link);
34bf3c00 2292 }
02b59d57
TG		 2293
2294 return 1;
2295}
2296
3f265037 2297static int link_enter_join_netdev(Link *link) {
6a0a2f86 2298 NetDev *netdev;
02b59d57
TG		 2299 int r;
2300
2301 assert(link);
2302 assert(link->network);
bd08ce56 2303 assert(link->state == LINK_STATE_INITIALIZED);
02b59d57 2304
289e6774 2305 link_set_state(link, LINK_STATE_CONFIGURING);
02b59d57 2306
84de38c5 2307 link_dirty(link);
34bf3c00 2308 link->enslaving = 0;
02b59d57 2309
d9c67ea1 2310 if (link->network->bond) {
cbff7170
TJ		 2311 if (link->network->bond->state == NETDEV_STATE_READY &&
2312 link->network->bond->ifindex == link->master_ifindex)
2313 return link_joined(link);
2314
f2341e0a
LP		 2315 log_struct(LOG_DEBUG,
2316 LOG_LINK_INTERFACE(link),
2317 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2318 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bond->ifname));
f2341e0a 2319
34bf3c00
YW		 2320 link->enslaving++;
2321
f2341e0a 2322 r = netdev_join(link->network->bond, link, netdev_join_handler);
52433f6b 2323 if (r < 0) {
f2341e0a
LP		 2324 log_struct_errno(LOG_WARNING, r,
2325 LOG_LINK_INTERFACE(link),
2326 LOG_NETDEV_INTERFACE(link->network->bond),
a1230ff9 2327 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bond->ifname));
52433f6b
TG		 2328 link_enter_failed(link);
2329 return r;
2330 }
0ad6148e
MO		 2331 }
2332
d9c67ea1 2333 if (link->network->bridge) {
f2341e0a
LP		 2334 log_struct(LOG_DEBUG,
2335 LOG_LINK_INTERFACE(link),
2336 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2337 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->bridge->ifname));
f2341e0a 2338
34bf3c00
YW		 2339 link->enslaving++;
2340
f2341e0a 2341 r = netdev_join(link->network->bridge, link, netdev_join_handler);
0ad6148e 2342 if (r < 0) {
f2341e0a
LP		 2343 log_struct_errno(LOG_WARNING, r,
2344 LOG_LINK_INTERFACE(link),
2345 LOG_NETDEV_INTERFACE(link->network->bridge),
a1230ff9 2346 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->bridge->ifname));
0ad6148e
MO		 2347 link_enter_failed(link);
2348 return r;
2349 }
52433f6b
TG		 2350 }
2351
6cb955c6
AR		 2352 if (link->network->vrf) {
2353 log_struct(LOG_DEBUG,
2354 LOG_LINK_INTERFACE(link),
2355 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9
ZJS		 2356 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", link->network->vrf->ifname));
2357
34bf3c00
YW		 2358 link->enslaving++;
2359
6cb955c6
AR		 2360 r = netdev_join(link->network->vrf, link, netdev_join_handler);
2361 if (r < 0) {
2362 log_struct_errno(LOG_WARNING, r,
2363 LOG_LINK_INTERFACE(link),
2364 LOG_NETDEV_INTERFACE(link->network->vrf),
a1230ff9 2365 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", link->network->vrf->ifname));
6cb955c6
AR		 2366 link_enter_failed(link);
2367 return r;
2368 }
6cb955c6
AR		 2369 }
2370
90e74a66 2371 HASHMAP_FOREACH(netdev, link->network->stacked_netdevs) {
7951dea2 2372
2b6db913
YW		 2373 if (netdev->ifindex > 0)
2374 /* Assume already enslaved. */
a63e5daa 2375 continue;
a63e5daa 2376
7033af49
YW		 2377 if (netdev_get_create_type(netdev) != NETDEV_CREATE_STACKED)
2378 continue;
2379
f2341e0a
LP		 2380 log_struct(LOG_DEBUG,
2381 LOG_LINK_INTERFACE(link),
2382 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2383 LOG_LINK_MESSAGE(link, "Enslaving by '%s'", netdev->ifname));
f2341e0a 2384
34bf3c00
YW		 2385 link->enslaving++;
2386
f2341e0a 2387 r = netdev_join(netdev, link, netdev_join_handler);
7951dea2 2388 if (r < 0) {
f2341e0a
LP		 2389 log_struct_errno(LOG_WARNING, r,
2390 LOG_LINK_INTERFACE(link),
2391 LOG_NETDEV_INTERFACE(netdev),
a1230ff9 2392 LOG_LINK_MESSAGE(link, "Could not join netdev '%s': %m", netdev->ifname));
326cb406
SS		 2393 link_enter_failed(link);
2394 return r;
2395 }
326cb406
SS		 2396 }
2397
34bf3c00
YW		 2398 if (link->enslaving == 0)
2399 return link_joined(link);
2400
ef1ba606
TG		 2401 return 0;
2402}
2403
769d324c 2404static int link_set_ipv4_forward(Link *link) {
5a8bcb67
LP		 2405 int r;
2406
765afd5c 2407 if (!link_ipv4_forward_enabled(link))
15dee3f0
LP		 2408 return 0;
2409
765afd5c
LP		 2410 /* We propagate the forwarding flag from one interface to the
2411 * global setting one way. This means: as long as at least one
2412 * interface was configured at any time that had IP forwarding
2413 * enabled the setting will stay on for good. We do this
2414 * primarily to keep IPv4 and IPv6 packet forwarding behaviour
2415 * somewhat in sync (see below). */
15dee3f0 2416
62e021a9 2417 r = sysctl_write_ip_property(AF_INET, NULL, "ip_forward", "1");
eb3da901 2418 if (r < 0)
765afd5c 2419 log_link_warning_errno(link, r, "Cannot turn on IPv4 packet forwarding, ignoring: %m");
43c6d5ab 2420
769d324c
LP		 2421 return 0;
2422}
2423
2424static int link_set_ipv6_forward(Link *link) {
769d324c
LP		 2425 int r;
2426
765afd5c 2427 if (!link_ipv6_forward_enabled(link))
8add5f79
NO		 2428 return 0;
2429
61233823 2430 /* On Linux, the IPv6 stack does not know a per-interface
765afd5c
LP		 2431 * packet forwarding setting: either packet forwarding is on
2432 * for all, or off for all. We hence don't bother with a
2433 * per-interface setting, but simply propagate the interface
2434 * flag, if it is set, to the global flag, one-way. Note that
2435 * while IPv4 would allow a per-interface flag, we expose the
2436 * same behaviour there and also propagate the setting from
2437 * one to all, to keep things simple (see above). */
15dee3f0 2438
62e021a9 2439 r = sysctl_write_ip_property(AF_INET6, "all", "forwarding", "1");
eb3da901 2440 if (r < 0)
765afd5c 2441 log_link_warning_errno(link, r, "Cannot configure IPv6 packet forwarding, ignoring: %m");
5a8bcb67
LP		 2442
2443 return 0;
2444}
2445
49092e22 2446static int link_set_ipv6_privacy_extensions(Link *link) {
1f0d9695 2447 IPv6PrivacyExtensions s;
49092e22
SS		 2448 int r;
2449
1f0d9695 2450 s = link_ipv6_privacy_extensions(link);
66a6bd68 2451 if (s < 0)
49092e22
SS		 2452 return 0;
2453
62e021a9 2454 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "use_tempaddr", (int) link->network->ipv6_privacy_extensions);
eb3da901 2455 if (r < 0)
49092e22
SS		 2456 log_link_warning_errno(link, r, "Cannot configure IPv6 privacy extension for interface: %m");
2457
2458 return 0;
2459}
2460
4f2e437a 2461static int link_set_ipv6_accept_ra(Link *link) {
4f2e437a
SS		 2462 int r;
2463
2464 /* Make this a NOP if IPv6 is not available */
2465 if (!socket_ipv6_is_supported())
2466 return 0;
2467
2468 if (link->flags & IFF_LOOPBACK)
2469 return 0;
2470
d68e2e59
LP		 2471 if (!link->network)
2472 return 0;
2473
62e021a9 2474 r = sysctl_write_ip_property(AF_INET6, link->ifname, "accept_ra", "0");
eb3da901 2475 if (r < 0)
fe307276 2476 log_link_warning_errno(link, r, "Cannot disable kernel IPv6 accept_ra for interface: %m");
4f2e437a
SS		 2477
2478 return 0;
2479}
2480
8749cbcd 2481static int link_set_ipv6_dad_transmits(Link *link) {
8749cbcd
SS		 2482 int r;
2483
2484 /* Make this a NOP if IPv6 is not available */
2485 if (!socket_ipv6_is_supported())
2486 return 0;
2487
2488 if (link->flags & IFF_LOOPBACK)
2489 return 0;
2490
d68e2e59
LP		 2491 if (!link->network)
2492 return 0;
2493
8749cbcd
SS		 2494 if (link->network->ipv6_dad_transmits < 0)
2495 return 0;
2496
62e021a9 2497 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "dad_transmits", link->network->ipv6_dad_transmits);
eb3da901 2498 if (r < 0)
8749cbcd 2499 log_link_warning_errno(link, r, "Cannot set IPv6 dad transmits for interface: %m");
8749cbcd
SS		 2500
2501 return 0;
2502}
2503
b69c3180 2504static int link_set_ipv6_hop_limit(Link *link) {
b69c3180
SS		 2505 int r;
2506
2507 /* Make this a NOP if IPv6 is not available */
2508 if (!socket_ipv6_is_supported())
2509 return 0;
2510
2511 if (link->flags & IFF_LOOPBACK)
2512 return 0;
2513
d68e2e59
LP		 2514 if (!link->network)
2515 return 0;
2516
b69c3180
SS		 2517 if (link->network->ipv6_hop_limit < 0)
2518 return 0;
2519
62e021a9 2520 r = sysctl_write_ip_property_int(AF_INET6, link->ifname, "hop_limit", link->network->ipv6_hop_limit);
eb3da901 2521 if (r < 0)
b69c3180 2522 log_link_warning_errno(link, r, "Cannot set IPv6 hop limit for interface: %m");
b69c3180
SS		 2523
2524 return 0;
2525}
2526
11102cba 2527static int link_set_ipv6_mtu(Link *link) {
11102cba
SS		 2528 int r;
2529
2530 /* Make this a NOP if IPv6 is not available */
2531 if (!socket_ipv6_is_supported())
2532 return 0;
2533
2534 if (link->flags & IFF_LOOPBACK)
2535 return 0;
2536
2537 if (link->network->ipv6_mtu == 0)
2538 return 0;
2539
d236718c
DS		 2540 /* IPv6 protocol requires a minimum MTU of IPV6_MTU_MIN(1280) bytes
2541 * on the interface. Bump up IPv6 MTU bytes to IPV6_MTU_MIN. */
2542 if (link->network->ipv6_mtu < IPV6_MIN_MTU) {
2543 log_link_notice(link, "Bumping IPv6 MTU to "STRINGIFY(IPV6_MIN_MTU)" byte minimum required");
2544 link->network->ipv6_mtu = IPV6_MIN_MTU;
2545 }
2546
62e021a9 2547 r = sysctl_write_ip_property_uint32(AF_INET6, link->ifname, "mtu", link->network->ipv6_mtu);
d236718c
DS		 2548 if (r < 0) {
2549 if (link->mtu < link->network->ipv6_mtu)
2550 log_link_warning(link, "Cannot set IPv6 MTU %"PRIu32" higher than device MTU %"PRIu32,
2551 link->network->ipv6_mtu, link->mtu);
2552 else
2553 log_link_warning_errno(link, r, "Cannot set IPv6 MTU for interface: %m");
2554 }
2555
2556 link->ipv6_mtu_set = true;
11102cba
SS		 2557
2558 return 0;
2559}
2560
94d76d07
YW		 2561static int link_set_ipv4_accept_local(Link *link) {
2562 int r;
2563
2564 if (link->flags & IFF_LOOPBACK)
2565 return 0;
2566
2567 if (link->network->ipv4_accept_local < 0)
2568 return 0;
2569
2570 r = sysctl_write_ip_property_boolean(AF_INET, link->ifname, "accept_local", link->network->ipv4_accept_local);
2571 if (r < 0)
2572 log_link_warning_errno(link, r, "Cannot set IPv4 accept_local flag for interface: %m");
2573
2574 return 0;
2575}
2576
30226d27
TJ		 2577static bool link_is_static_address_configured(Link *link, Address *address) {
2578 Address *net_address;
2579
2580 assert(link);
2581 assert(address);
2582
2583 if (!link->network)
2584 return false;
2585
2586 LIST_FOREACH(addresses, net_address, link->network->static_addresses)
2587 if (address_equal(net_address, address))
2588 return true;
6f5d73ab
YW		 2589 else if (address->family == AF_INET6 && net_address->family == AF_INET6 &&
2590 in_addr_equal(AF_INET6, &address->in_addr, &net_address->in_addr_peer) > 0)
2591 return true;
30226d27
TJ		 2592
2593 return false;
2594}
2595
7ecf0c3e
TJ		 2596static bool link_is_static_route_configured(Link *link, Route *route) {
2597 Route *net_route;
2598
2599 assert(link);
2600 assert(route);
2601
2602 if (!link->network)
2603 return false;
2604
2605 LIST_FOREACH(routes, net_route, link->network->static_routes)
2606 if (route_equal(net_route, route))
2607 return true;
2608
2609 return false;
2610}
2611
db51778f
YW		 2612static bool link_address_is_dynamic(Link *link, Address *address) {
2613 Route *route;
db51778f
YW		 2614
2615 assert(link);
2616 assert(address);
2617
2618 if (address->cinfo.ifa_prefered != CACHE_INFO_INFINITY_LIFE_TIME)
2619 return true;
2620
2621 /* Even when the address is leased from a DHCP server, networkd assign the address
2622 * without lifetime when KeepConfiguration=dhcp. So, let's check that we have
2623 * corresponding routes with RTPROT_DHCP. */
90e74a66 2624 SET_FOREACH(route, link->routes_foreign) {
db51778f
YW		 2625 if (route->protocol != RTPROT_DHCP)
2626 continue;
2627
2628 if (address->family != route->family)
2629 continue;
2630
2631 if (in_addr_equal(address->family, &address->in_addr, &route->prefsrc))
2632 return true;
2633 }
2634
2635 return false;
2636}
2637
0917a271
DS		 2638static int link_enumerate_ipv6_tentative_addresses(Link *link) {
2639 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL, *reply = NULL;
2640 sd_netlink_message *addr;
2641 int r;
2642
2643 assert(link);
2644 assert(link->manager);
2645 assert(link->manager->rtnl);
2646
2647 r = sd_rtnl_message_new_addr(link->manager->rtnl, &req, RTM_GETADDR, 0, AF_INET6);
2648 if (r < 0)
2649 return r;
2650
2651 r = sd_netlink_call(link->manager->rtnl, req, 0, &reply);
2652 if (r < 0)
2653 return r;
2654
2655 for (addr = reply; addr; addr = sd_netlink_message_next(addr)) {
2656 unsigned char flags;
2657 int ifindex;
2658
2659 r = sd_rtnl_message_addr_get_ifindex(addr, &ifindex);
2660 if (r < 0) {
2661 log_link_warning_errno(link, r, "rtnl: invalid ifindex, ignoring: %m");
2662 continue;
2663 } else if (link->ifindex != ifindex)
2664 continue;
2665
2666 r = sd_rtnl_message_addr_get_flags(addr, &flags);
2667 if (r < 0) {
2668 log_link_warning_errno(link, r, "rtnl: received address message with invalid flags, ignoring: %m");
2669 continue;
2670 } else if (!(flags & IFA_F_TENTATIVE))
2671 continue;
2672
2673 log_link_debug(link, "Found tentative ipv6 link-local address");
2674 (void) manager_rtnl_process_address(link->manager->rtnl, addr, link->manager);
2675 }
2676
2677 return 0;
2678}
2679
5e5b137a
TG		 2680static int link_drop_foreign_config(Link *link) {
2681 Address *address;
2682 Route *route;
5e5b137a
TG		 2683 int r;
2684
0917a271
DS		 2685 /* The kernel doesn't notify us about tentative addresses;
2686 * so if ipv6ll is disabled, we need to enumerate them now so we can drop them below */
2687 if (!link_ipv6ll_enabled(link)) {
2688 r = link_enumerate_ipv6_tentative_addresses(link);
2689 if (r < 0)
2690 return r;
2691 }
2692
90e74a66 2693 SET_FOREACH(address, link->addresses_foreign) {
fe307276 2694 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2695 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
5e5b137a
TG		 2696 continue;
2697
db51778f 2698 if (link_address_is_dynamic(link, address)) {
b1b0b42e 2699 if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
db51778f 2700 continue;
b1b0b42e 2701 } else if (link->network && FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
db51778f
YW		 2702 continue;
2703
30226d27
TJ		 2704 if (link_is_static_address_configured(link, address)) {
2705 r = address_add(link, address->family, &address->in_addr, address->prefixlen, NULL);
2706 if (r < 0)
2707 return log_link_error_errno(link, r, "Failed to add address: %m");
2708 } else {
63ae0569 2709 r = address_remove(address, link, NULL);
30226d27
TJ		 2710 if (r < 0)
2711 return r;
2712 }
5e5b137a
TG		 2713 }
2714
59048336
YW		 2715 r = link_drop_foreign_neighbors(link);
2716 if (r < 0)
2717 return r;
d1bdafd2 2718
90e74a66 2719 SET_FOREACH(route, link->routes_foreign) {
fe307276 2720 /* do not touch routes managed by the kernel */
5e5b137a
TG		 2721 if (route->protocol == RTPROT_KERNEL)
2722 continue;
2723
bd7d6cec
YW		 2724 /* do not touch multicast route added by kernel */
2725 /* FIXME: Why the kernel adds this route with protocol RTPROT_BOOT??? We need to investigate that.
2726 * https://tools.ietf.org/html/rfc4862#section-5.4 may explain why. */
2727 if (route->protocol == RTPROT_BOOT &&
2728 route->family == AF_INET6 &&
2729 route->dst_prefixlen == 8 &&
2730 in_addr_equal(AF_INET6, &route->dst, &(union in_addr_union) { .in6 = {{{ 0xff,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0 }}} }))
2731 continue;
2732
b1b0b42e 2733 if (route->protocol == RTPROT_STATIC && link->network &&
db51778f
YW		 2734 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_STATIC))
2735 continue;
2736
b1b0b42e 2737 if (route->protocol == RTPROT_DHCP && link->network &&
db51778f
YW		 2738 FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
2739 continue;
2740
7ecf0c3e 2741 if (link_is_static_route_configured(link, route)) {
f1368755 2742 r = route_add(link, route, NULL);
7ecf0c3e
TJ		 2743 if (r < 0)
2744 return r;
2745 } else {
4645ad47 2746 r = route_remove(route, link, NULL);
7ecf0c3e
TJ		 2747 if (r < 0)
2748 return r;
2749 }
5e5b137a
TG		 2750 }
2751
2752 return 0;
2753}
2754
9b966cee
YW		 2755static int remove_static_address_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
2756 int r;
2757
2758 assert(m);
2759 assert(link);
2760 assert(link->ifname);
2761 assert(link->address_remove_messages > 0);
2762
2763 link->address_remove_messages--;
2764
2765 if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
2766 return 1;
2767
2768 r = sd_netlink_message_get_errno(m);
2769 if (r < 0 && r != -EADDRNOTAVAIL)
2770 log_link_message_warning_errno(link, m, r, "Could not drop address");
2771 else if (r >= 0)
2772 (void) manager_rtnl_process_address(rtnl, m, link->manager);
2773
2774 if (link->address_remove_messages == 0 && link->request_static_addresses) {
2775 link_set_state(link, LINK_STATE_CONFIGURING);
2776 r = link_request_set_addresses(link);
2777 if (r < 0)
2778 link_enter_failed(link);
2779 }
2780
2781 return 1;
2782}
2783
3104883d 2784static int link_drop_config(Link *link) {
410a7f15 2785 Address *address, *pool_address;
3104883d 2786 Route *route;
3104883d
SS		 2787 int r;
2788
90e74a66 2789 SET_FOREACH(address, link->addresses) {
3104883d 2790 /* we consider IPv6LL addresses to be managed by the kernel */
5539fc0f 2791 if (address->family == AF_INET6 && in_addr_is_link_local(AF_INET6, &address->in_addr) == 1 && link_ipv6ll_enabled(link))
3104883d
SS		 2792 continue;
2793
9b966cee 2794 r = address_remove(address, link, remove_static_address_handler);
3104883d
SS		 2795 if (r < 0)
2796 return r;
410a7f15 2797
9b966cee
YW		 2798 link->address_remove_messages++;
2799
410a7f15 2800 /* If this address came from an address pool, clean up the pool */
b6766fb1 2801 LIST_FOREACH(addresses, pool_address, link->pool_addresses)
410a7f15
RM		 2802 if (address_equal(address, pool_address)) {
2803 LIST_REMOVE(addresses, link->pool_addresses, pool_address);
2804 address_free(pool_address);
2805 break;
2806 }
3104883d
SS		 2807 }
2808
59048336
YW		 2809 r = link_drop_neighbors(link);
2810 if (r < 0)
2811 return r;
d1bdafd2 2812
90e74a66 2813 SET_FOREACH(route, link->routes) {
3104883d
SS		 2814 /* do not touch routes managed by the kernel */
2815 if (route->protocol == RTPROT_KERNEL)
2816 continue;
2817
4645ad47 2818 r = route_remove(route, link, NULL);
3104883d
SS		 2819 if (r < 0)
2820 return r;
2821 }
2822
c69305ff
LP		 2823 ndisc_flush(link);
2824
3104883d
SS		 2825 return 0;
2826}
2827
051e77ca
SS		 2828static int link_configure_ipv4_dad(Link *link) {
2829 Address *address;
2830 int r;
2831
2832 assert(link);
2833 assert(link->network);
2834
2835 LIST_FOREACH(addresses, address, link->network->static_addresses)
2836 if (address->family == AF_INET &&
2837 FLAGS_SET(address->duplicate_address_detection, ADDRESS_FAMILY_IPV4)) {
2838 r = configure_ipv4_duplicate_address_detection(link, address);
2839 if (r < 0)
2840 return log_link_error_errno(link, r, "Failed to configure IPv4ACD: %m");
2841 }
2842
2843 return 0;
2844}
2845
34658df2
YW		 2846static int link_configure_traffic_control(Link *link) {
2847 TrafficControl *tc;
02b59d57
TG		 2848 int r;
2849
34658df2
YW		 2850 link->tc_configured = false;
2851 link->tc_messages = 0;
4ecdcb07 2852
90e74a66 2853 ORDERED_HASHMAP_FOREACH(tc, link->network->tc_by_section) {
34658df2 2854 r = traffic_control_configure(link, tc);
4ecdcb07
YW		 2855 if (r < 0)
2856 return r;
2857 }
2858
34658df2
YW		 2859 if (link->tc_messages == 0)
2860 link->tc_configured = true;
4ecdcb07 2861 else
34658df2 2862 log_link_debug(link, "Configuring traffic control");
4ecdcb07
YW		 2863
2864 return 0;
2865}
2866
518cd6b5
SS		 2867static int link_configure_sr_iov(Link *link) {
2868 SRIOV *sr_iov;
518cd6b5
SS		 2869 int r;
2870
2871 link->sr_iov_configured = false;
2872 link->sr_iov_messages = 0;
2873
90e74a66 2874 ORDERED_HASHMAP_FOREACH(sr_iov, link->network->sr_iov_by_section) {
518cd6b5
SS		 2875 r = sr_iov_configure(link, sr_iov);
2876 if (r < 0)
2877 return r;
2878 }
2879
2880 if (link->sr_iov_messages == 0)
2881 link->sr_iov_configured = true;
2882 else
2883 log_link_debug(link, "Configuring SR-IOV");
2884
2885 return 0;
2886}
2887
4ecdcb07
YW		 2888static int link_configure(Link *link) {
2889 int r;
2890
ef1ba606 2891 assert(link);
b22d8a00 2892 assert(link->network);
bd08ce56 2893 assert(link->state == LINK_STATE_INITIALIZED);
a748b692 2894
34658df2 2895 r = link_configure_traffic_control(link);
4ecdcb07
YW		 2896 if (r < 0)
2897 return r;
2898
518cd6b5
SS		 2899 r = link_configure_sr_iov(link);
2900 if (r < 0)
2901 return r;
2902
500b96eb 2903 if (link->iftype == ARPHRD_CAN)
93ea7750 2904 return link_configure_can(link);
92c918b0 2905
482efedc
SS		 2906 /* If IPv6 configured that is static IPv6 address and IPv6LL autoconfiguration is enabled
2907 * for this interface, then enable IPv6 */
57ad7607 2908 (void) link_update_ipv6_sysctl(link);
482efedc 2909
23d8b221
SS		 2910 r = link_set_proxy_arp(link);
2911 if (r < 0)
2912 return r;
2913
a0e5c15d
FK		 2914 r = ipv6_proxy_ndp_addresses_configure(link);
2915 if (r < 0)
2916 return r;
2917
769d324c
LP		 2918 r = link_set_ipv4_forward(link);
2919 if (r < 0)
2920 return r;
2921
2922 r = link_set_ipv6_forward(link);
5a8bcb67
LP		 2923 if (r < 0)
2924 return r;
2925
49092e22
SS		 2926 r = link_set_ipv6_privacy_extensions(link);
2927 if (r < 0)
2928 return r;
2929
4f2e437a
SS		 2930 r = link_set_ipv6_accept_ra(link);
2931 if (r < 0)
2932 return r;
2933
8749cbcd
SS		 2934 r = link_set_ipv6_dad_transmits(link);
2935 if (r < 0)
2936 return r;
b69c3180
SS		 2937
2938 r = link_set_ipv6_hop_limit(link);
2939 if (r < 0)
2940 return r;
8749cbcd 2941
94d76d07
YW		 2942 r = link_set_ipv4_accept_local(link);
2943 if (r < 0)
2944 return r;
2945
99d2baa2
SS		 2946 r = link_set_flags(link);
2947 if (r < 0)
2948 return r;
2949
89fe6535
SS		 2950 r = link_set_group(link);
2951 if (r < 0)
2952 return r;
2953
910feb78 2954 if (link_ipv4ll_enabled(link, ADDRESS_FAMILY_IPV4 | ADDRESS_FAMILY_FALLBACK_IPV4)) {
b22d8a00 2955 r = ipv4ll_configure(link);
eb34d4af
TG		 2956 if (r < 0)
2957 return r;
2958 }
2959
78c958f8 2960 if (link_dhcp4_enabled(link)) {
64b21ece
MV		 2961 r = dhcp4_set_promote_secondaries(link);
2962 if (r < 0)
2963 return r;
2964
3c9b8860 2965 r = dhcp4_configure(link);
eb34d4af
TG		 2966 if (r < 0)
2967 return r;
eb34d4af
TG		 2968 }
2969
78c958f8 2970 if (link_dhcp4_server_enabled(link)) {
dd43110f
TG		 2971 r = sd_dhcp_server_new(&link->dhcp_server, link->ifindex);
2972 if (r < 0)
2973 return r;
2974
2975 r = sd_dhcp_server_attach_event(link->dhcp_server, NULL, 0);
2976 if (r < 0)
2977 return r;
dd43110f
TG		 2978 }
2979
62379e88
TG		 2980 if (link_dhcp6_enabled(link) ||
2981 link_ipv6_accept_ra_enabled(link)) {
f5a8c43f
TG		 2982 r = dhcp6_configure(link);
2983 if (r < 0)
2984 return r;
2985 }
2986
2987 if (link_ipv6_accept_ra_enabled(link)) {
de1e9928 2988 r = ndisc_configure(link);
4138fb2c
PF		 2989 if (r < 0)
2990 return r;
2991 }
2992
7465dd22
PF		 2993 if (link_radv_enabled(link)) {
2994 r = radv_configure(link);
2995 if (r < 0)
2996 return r;
2997 }
2998
8e1ad1ea 2999 if (link_lldp_rx_enabled(link)) {
7f853950 3000 r = link_lldp_rx_configure(link);
273eec24
LP		 3001 if (r < 0)
3002 return r;
ce43e484
SS		 3003 }
3004
f6fcc1c2 3005 r = link_configure_mtu(link);
40288ece
YW		 3006 if (r < 0)
3007 return r;
44b598a1 3008
9f6e82e6
YW		 3009 r = link_configure_addrgen_mode(link);
3010 if (r < 0)
3011 return r;
0e2fdb83 3012
051e77ca
SS		 3013 r = link_configure_ipv4_dad(link);
3014 if (r < 0)
3015 return r;
3016
3a390124
DS		 3017 return link_configure_continue(link);
3018}
3019
3020/* The configuration continues in this separate function, instead of
3021 * including this in the above link_configure() function, for two
3022 * reasons:
3023 * 1) some devices reset the link when the mtu is set, which caused
3024 * an infinite loop here in networkd; see:
3025 * https://github.com/systemd/systemd/issues/6593
3026 * https://github.com/systemd/systemd/issues/9831
3027 * 2) if ipv6ll is disabled, then bringing the interface up must be
3028 * delayed until after we get confirmation from the kernel that
3029 * the addr_gen_mode parameter has been set (via netlink), see:
3030 * https://github.com/systemd/systemd/issues/13882
3031 */
3032static int link_configure_continue(Link *link) {
55dc8c4a
YW		 3033 int r;
3034
3035 assert(link);
3036 assert(link->network);
bd08ce56 3037 assert(link->state == LINK_STATE_INITIALIZED);
55dc8c4a 3038
9524014e 3039 if (link->setting_mtu || link->setting_genmode)
55dc8c4a
YW		 3040 return 0;
3041
4c649652
DS		 3042 /* Drop foreign config, but ignore loopback or critical devices.
3043 * We do not want to remove loopback address or addresses used for root NFS. */
3044 if (!(link->flags & IFF_LOOPBACK) &&
3045 link->network->keep_configuration != KEEP_CONFIGURATION_YES) {
3046 r = link_drop_foreign_config(link);
3047 if (r < 0)
3048 return r;
3049 }
3050
d236718c
DS		 3051 /* The kernel resets ipv6 mtu after changing device mtu;
3052 * we must set this here, after we've set device mtu */
3053 r = link_set_ipv6_mtu(link);
3054 if (r < 0)
3055 return r;
3056
dad2d78e 3057 if (link_has_carrier(link) || link->network->configure_without_carrier) {
1e9be60b
TG		 3058 r = link_acquire_conf(link);
3059 if (r < 0)
3060 return r;
cc544d5f 3061 }
1e9be60b 3062
3f265037 3063 return link_enter_join_netdev(link);
505f8da7
TG		 3064}
3065
27dfc982
YW		 3066static int duid_set_uuid(DUID *duid, sd_id128_t uuid) {
3067 assert(duid);
3068
3069 if (duid->raw_data_len > 0)
3070 return 0;
3071
3072 if (duid->type != DUID_TYPE_UUID)
3073 return -EINVAL;
3074
3075 memcpy(&duid->raw_data, &uuid, sizeof(sd_id128_t));
3076 duid->raw_data_len = sizeof(sd_id128_t);
3077
3078 return 1;
3079}
3080
3081int get_product_uuid_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
3082 Manager *manager = userdata;
3083 const sd_bus_error *e;
3084 const void *a;
3085 size_t sz;
3086 DUID *duid;
3087 Link *link;
3088 int r;
3089
3090 assert(m);
3091 assert(manager);
3092
3093 e = sd_bus_message_get_error(m);
3094 if (e) {
3095 log_error_errno(sd_bus_error_get_errno(e),
ab4dd984 3096 "Could not get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %s",
27dfc982
YW		 3097 e->message);
3098 goto configure;
3099 }
3100
3101 r = sd_bus_message_read_array(m, 'y', &a, &sz);
3102 if (r < 0)
3103 goto configure;
3104
3105 if (sz != sizeof(sd_id128_t)) {
ab4dd984 3106 log_error("Invalid product UUID. Falling back to use machine-app-specific ID as DUID-UUID.");
27dfc982
YW		 3107 goto configure;
3108 }
3109
3110 memcpy(&manager->product_uuid, a, sz);
3111 while ((duid = set_steal_first(manager->duids_requesting_uuid)))
3112 (void) duid_set_uuid(duid, manager->product_uuid);
3113
3114 manager->duids_requesting_uuid = set_free(manager->duids_requesting_uuid);
3115
3116configure:
3117 while ((link = set_steal_first(manager->links_requesting_uuid))) {
3dc2e7af
YW		 3118 link_unref(link);
3119
27dfc982
YW		 3120 r = link_configure(link);
3121 if (r < 0)
4ff296b0 3122 link_enter_failed(link);
27dfc982
YW		 3123 }
3124
3125 manager->links_requesting_uuid = set_free(manager->links_requesting_uuid);
3126
3127 /* To avoid calling GetProductUUID() bus method so frequently, set the flag below
3128 * even if the method fails. */
3129 manager->has_product_uuid = true;
3130
3131 return 1;
3132}
3133
3134static bool link_requires_uuid(Link *link) {
3135 const DUID *duid;
3136
3137 assert(link);
3138 assert(link->manager);
3139 assert(link->network);
3140
3141 duid = link_get_duid(link);
3142 if (duid->type != DUID_TYPE_UUID || duid->raw_data_len != 0)
3143 return false;
3144
3145 if (link_dhcp4_enabled(link) && IN_SET(link->network->dhcp_client_identifier, DHCP_CLIENT_ID_DUID, DHCP_CLIENT_ID_DUID_ONLY))
3146 return true;
3147
3148 if (link_dhcp6_enabled(link) || link_ipv6_accept_ra_enabled(link))
3149 return true;
3150
3151 return false;
3152}
3153
3154static int link_configure_duid(Link *link) {
3155 Manager *m;
3156 DUID *duid;
3157 int r;
3158
3159 assert(link);
3160 assert(link->manager);
3161 assert(link->network);
3162
3163 m = link->manager;
3164 duid = link_get_duid(link);
3165
3166 if (!link_requires_uuid(link))
3167 return 1;
3168
3169 if (m->has_product_uuid) {
3170 (void) duid_set_uuid(duid, m->product_uuid);
3171 return 1;
3172 }
3173
3174 if (!m->links_requesting_uuid) {
3175 r = manager_request_product_uuid(m, link);
3176 if (r < 0) {
3177 if (r == -ENOMEM)
3178 return r;
3179
ab4dd984
ZJS		 3180 log_link_warning_errno(link, r,
3181 "Failed to get product UUID. Falling back to use machine-app-specific ID as DUID-UUID: %m");
27dfc982
YW		 3182 return 1;
3183 }
3184 } else {
3185 r = set_put(m->links_requesting_uuid, link);
3186 if (r < 0)
3187 return log_oom();
39dbd0c7
ZJS		 3188 if (r > 0)
3189 link_ref(link);
27dfc982
YW		 3190
3191 r = set_put(m->duids_requesting_uuid, duid);
3192 if (r < 0)
3193 return log_oom();
3194 }
3195
3196 return 0;
3197}
3198
572b21d9 3199static int link_reconfigure_internal(Link *link, sd_netlink_message *m, bool force) {
ad932b15
YW		 3200 Network *network;
3201 int r;
3202
572b21d9
YW		 3203 if (m) {
3204 _cleanup_strv_free_ char **s = NULL;
3205
3206 r = sd_netlink_message_get_errno(m);
3207 if (r < 0)
3208 return r;
3209
3210 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3211 if (r < 0 && r != -ENODATA)
3212 return r;
3213
3214 strv_free_and_replace(link->alternative_names, s);
3215 }
3216
c643bda5
YW		 3217 r = network_get(link->manager, link->iftype, link->sd_device,
3218 link->ifname, link->alternative_names, link->driver,
3219 &link->mac, &link->permanent_mac,
3220 link->wlan_iftype, link->ssid, &link->bssid, &network);
ad932b15
YW		 3221 if (r == -ENOENT) {
3222 link_enter_unmanaged(link);
3223 return 0;
3224 } else if (r == 0 && network->unmanaged) {
3225 link_enter_unmanaged(link);
3226 return 0;
3227 } else if (r < 0)
3228 return r;
3229
99b8517c 3230 if (link->network == network && !force)
ad932b15
YW		 3231 return 0;
3232
3233 log_link_info(link, "Re-configuring with %s", network->filename);
3234
3235 /* Dropping old .network file */
3236 r = link_stop_clients(link, false);
572b21d9 3237 if (r < 0)
ad932b15 3238 return r;
ad932b15
YW		 3239
3240 if (link_dhcp4_server_enabled(link))
3241 (void) sd_dhcp_server_stop(link->dhcp_server);
3242
3243 r = link_drop_config(link);
3244 if (r < 0)
3245 return r;
3246
2c7b826d 3247 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
ad932b15
YW		 3248 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
3249 r = link_drop_foreign_config(link);
3250 if (r < 0)
3251 return r;
3252 }
3253
3254 link_free_carrier_maps(link);
3255 link_free_engines(link);
3256 link->network = network_unref(link->network);
3257
3258 /* Then, apply new .network file */
3259 r = network_apply(network, link);
3260 if (r < 0)
3261 return r;
3262
3263 r = link_new_carrier_maps(link);
3264 if (r < 0)
3265 return r;
3266
3267 link_set_state(link, LINK_STATE_INITIALIZED);
8ae7b8a1 3268 link_dirty(link);
ad932b15
YW		 3269
3270 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3271 * link_configure() is called later asynchronously. */
3272 r = link_configure_duid(link);
3273 if (r <= 0)
3274 return r;
3275
3276 r = link_configure(link);
3277 if (r < 0)
3278 return r;
3279
3280 return 0;
3281}
3282
572b21d9
YW		 3283static int link_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3284 int r;
3285
3286 r = link_reconfigure_internal(link, m, false);
3287 if (r < 0)
3288 link_enter_failed(link);
3289
3290 return 1;
3291}
3292
3293static int link_force_reconfigure_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
3294 int r;
3295
3296 r = link_reconfigure_internal(link, m, true);
3297 if (r < 0)
3298 link_enter_failed(link);
3299
3300 return 1;
3301}
3302
3303int link_reconfigure(Link *link, bool force) {
3304 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
3305 int r;
3306
2c0d7ed3
YW		 3307 if (IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_LINGER))
3308 return 0;
3309
572b21d9
YW		 3310 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3311 link->ifindex);
3312 if (r < 0)
3313 return r;
3314
3315 r = netlink_call_async(link->manager->rtnl, NULL, req,
3316 force ? link_force_reconfigure_handler : link_reconfigure_handler,
3317 link_netlink_destroy_callback, link);
3318 if (r < 0)
3319 return r;
3320
3321 link_ref(link);
3322
3323 return 0;
3324}
3325
e6bf7774 3326static int link_initialized_and_synced(Link *link) {
505f8da7 3327 Network *network;
505f8da7
TG		 3328 int r;
3329
3330 assert(link);
3331 assert(link->ifname);
3332 assert(link->manager);
3333
bd08ce56
YW		 3334 /* We may get called either from the asynchronous netlink callback,
3335 * or directly for link_add() if running in a container. See link_add(). */
3336 if (!IN_SET(link->state, LINK_STATE_PENDING, LINK_STATE_INITIALIZED))
4232cf04 3337 return 0;
505f8da7 3338
6a7a4e4d 3339 log_link_debug(link, "Link state is up-to-date");
bd08ce56 3340 link_set_state(link, LINK_STATE_INITIALIZED);
505f8da7 3341
0d4ad91d
AR		 3342 r = link_new_bound_by_list(link);
3343 if (r < 0)
3344 return r;
3345
3346 r = link_handle_bound_by_list(link);
3347 if (r < 0)
3348 return r;
3349
c4a03a56 3350 if (!link->network) {
0894cfe4 3351 r = wifi_get_info(link);
8d968fdd
YW		 3352 if (r < 0)
3353 return r;
3354
c643bda5
YW		 3355 r = network_get(link->manager, link->iftype, link->sd_device,
3356 link->ifname, link->alternative_names, link->driver,
3357 &link->mac, &link->permanent_mac,
3358 link->wlan_iftype, link->ssid, &link->bssid, &network);
c4a03a56
TG		 3359 if (r == -ENOENT) {
3360 link_enter_unmanaged(link);
4232cf04 3361 return 0;
a09dc546
DM		 3362 } else if (r == 0 && network->unmanaged) {
3363 link_enter_unmanaged(link);
3364 return 0;
c4a03a56
TG		 3365 } else if (r < 0)
3366 return r;
505f8da7 3367
c4a03a56
TG		 3368 if (link->flags & IFF_LOOPBACK) {
3369 if (network->link_local != ADDRESS_FAMILY_NO)
3370 log_link_debug(link, "Ignoring link-local autoconfiguration for loopback link");
78c958f8 3371
c4a03a56
TG		 3372 if (network->dhcp != ADDRESS_FAMILY_NO)
3373 log_link_debug(link, "Ignoring DHCP clients for loopback link");
78c958f8 3374
c4a03a56
TG		 3375 if (network->dhcp_server)
3376 log_link_debug(link, "Ignoring DHCP server for loopback link");
3377 }
bd2efe92 3378
7d342c03 3379 r = network_apply(network, link);
c4a03a56
TG		 3380 if (r < 0)
3381 return r;
3382 }
505f8da7 3383
0d4ad91d
AR		 3384 r = link_new_bound_to_list(link);
3385 if (r < 0)
3386 return r;
3387
27dfc982
YW		 3388 /* link_configure_duid() returns 0 if it requests product UUID. In that case,
3389 * link_configure() is called later asynchronously. */
3390 r = link_configure_duid(link);
3391 if (r <= 0)
3392 return r;
3393
a748b692
TG		 3394 r = link_configure(link);
3395 if (r < 0)
3396 return r;
3397
4232cf04 3398 return 0;
505f8da7
TG		 3399}
3400
302a796f 3401static int link_initialized_handler(sd_netlink *rtnl, sd_netlink_message *m, Link *link) {
572b21d9 3402 _cleanup_strv_free_ char **s = NULL;
4ff296b0
YW		 3403 int r;
3404
572b21d9
YW		 3405 r = sd_netlink_message_get_errno(m);
3406 if (r < 0) {
40681e5c 3407 log_link_warning_errno(link, r, "Failed to wait for the interface to be initialized: %m");
572b21d9
YW		 3408 link_enter_failed(link);
3409 return 0;
3410 }
3411
3412 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3413 if (r < 0 && r != -ENODATA) {
3414 link_enter_failed(link);
3415 return 0;
3416 }
3417
3418 strv_free_and_replace(link->alternative_names, s);
3419
4ff296b0
YW		 3420 r = link_initialized_and_synced(link);
3421 if (r < 0)
3422 link_enter_failed(link);
e6bf7774
YW		 3423 return 1;
3424}
3425
51517f9e 3426int link_initialized(Link *link, sd_device *device) {
4afd3348 3427 _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
4f561e8e
TG		 3428 int r;
3429
3430 assert(link);
3431 assert(link->manager);
3432 assert(link->manager->rtnl);
3433 assert(device);
3434
8434fd5c 3435 if (link->state != LINK_STATE_PENDING)
4f561e8e
TG		 3436 return 0;
3437
51517f9e 3438 if (link->sd_device)
679b3605
TG		 3439 return 0;
3440
79008bdd 3441 log_link_debug(link, "udev initialized link");
bd08ce56 3442 link_set_state(link, LINK_STATE_INITIALIZED);
4f561e8e 3443
51517f9e 3444 link->sd_device = sd_device_ref(device);
4f561e8e 3445
3c9b8860
TG		 3446 /* udev has initialized the link, but we don't know if we have yet
3447 * processed the NEWLINK messages with the latest state. Do a GETLINK,
3448 * when it returns we know that the pending NEWLINKs have already been
3449 * processed and that we are up-to-date */
4f561e8e 3450
3c9b8860
TG		 3451 r = sd_rtnl_message_new_link(link->manager->rtnl, &req, RTM_GETLINK,
3452 link->ifindex);
4f561e8e
TG		 3453 if (r < 0)
3454 return r;
3455
302a796f
YW		 3456 r = netlink_call_async(link->manager->rtnl, NULL, req, link_initialized_handler,
3457 link_netlink_destroy_callback, link);
4f561e8e
TG		 3458 if (r < 0)
3459 return r;
3460
5da8149f
TG		 3461 link_ref(link);
3462
4f561e8e
TG		 3463 return 0;
3464}
3465
c4a03a56 3466static int link_load(Link *link) {
0bc70f1d
TG		 3467 _cleanup_free_ char *network_file = NULL,
3468 *addresses = NULL,
f703cc2c 3469 *routes = NULL,
0bc70f1d
TG		 3470 *dhcp4_address = NULL,
3471 *ipv4ll_address = NULL;
3472 union in_addr_union address;
c4a03a56
TG		 3473 int r;
3474
3475 assert(link);
3476
aa8fbc74 3477 r = parse_env_file(NULL, link->state_file,
c4a03a56
TG		 3478 "NETWORK_FILE", &network_file,
3479 "ADDRESSES", &addresses,
f703cc2c 3480 "ROUTES", &routes,
0bc70f1d 3481 "DHCP4_ADDRESS", &dhcp4_address,
13df9c39 3482 "IPV4LL_ADDRESS", &ipv4ll_address);
c4a03a56
TG		 3483 if (r < 0 && r != -ENOENT)
3484 return log_link_error_errno(link, r, "Failed to read %s: %m", link->state_file);
3485
3486 if (network_file) {
3487 Network *network;
3488 char *suffix;
3489
3490 /* drop suffix */
3491 suffix = strrchr(network_file, '.');
3492 if (!suffix) {
3493 log_link_debug(link, "Failed to get network name from %s", network_file);
3494 goto network_file_fail;
3495 }
3496 *suffix = '\0';
3497
3498 r = network_get_by_name(link->manager, basename(network_file), &network);
3499 if (r < 0) {
3500 log_link_debug_errno(link, r, "Failed to get network %s: %m", basename(network_file));
3501 goto network_file_fail;
3502 }
3503
7d342c03 3504 r = network_apply(network, link);
c4a03a56
TG		 3505 if (r < 0)
3506 return log_link_error_errno(link, r, "Failed to apply network %s: %m", basename(network_file));
3507 }
3508
3509network_file_fail:
3510
1f68f772
ZJS		 3511 for (const char *p = addresses; p; ) {
3512 _cleanup_free_ char *address_str = NULL;
3513 char *prefixlen_str;
3514 int family;
3515 unsigned char prefixlen;
c4a03a56 3516
1f68f772
ZJS		 3517 r = extract_first_word(&p, &address_str, NULL, 0);
3518 if (r < 0)
3519 log_link_warning_errno(link, r, "failed to parse ADDRESSES: %m");
3520 if (r <= 0)
3521 break;
c4a03a56 3522
1f68f772
ZJS		 3523 prefixlen_str = strchr(address_str, '/');
3524 if (!prefixlen_str) {
3525 log_link_debug(link, "Failed to parse address and prefix length %s", address_str);
3526 continue;
3527 }
3528 *prefixlen_str++ = '\0';
c4a03a56 3529
1f68f772
ZJS		 3530 r = sscanf(prefixlen_str, "%hhu", &prefixlen);
3531 if (r != 1) {
3532 log_link_error(link, "Failed to parse prefixlen %s", prefixlen_str);
3533 continue;
3534 }
c4a03a56 3535
1f68f772
ZJS		 3536 r = in_addr_from_string_auto(address_str, &family, &address);
3537 if (r < 0) {
3538 log_link_debug_errno(link, r, "Failed to parse address %s: %m", address_str);
3539 continue;
c4a03a56 3540 }
c4a03a56 3541
1f68f772
ZJS		 3542 r = address_add(link, family, &address, prefixlen, NULL);
3543 if (r < 0)
3544 return log_link_error_errno(link, r, "Failed to add address: %m");
3545 }
74544b4e 3546
1f68f772
ZJS		 3547 for (const char *p = routes; p; ) {
3548 _cleanup_(sd_event_source_unrefp) sd_event_source *expire = NULL;
3549 _cleanup_(route_freep) Route *tmp = NULL;
3550 _cleanup_free_ char *route_str = NULL;
3551 char *prefixlen_str;
3552 Route *route;
f703cc2c 3553
1f68f772
ZJS		 3554 r = extract_first_word(&p, &route_str, NULL, 0);
3555 if (r < 0)
3556 log_link_debug_errno(link, r, "failed to parse ROUTES: %m");
3557 if (r <= 0)
3558 break;
c598ac76 3559
1f68f772
ZJS		 3560 prefixlen_str = strchr(route_str, '/');
3561 if (!prefixlen_str) {
3562 log_link_debug(link, "Failed to parse route %s", route_str);
3563 continue;
3564 }
3565 *prefixlen_str++ = '\0';
f703cc2c 3566
1f68f772
ZJS		 3567 r = route_new(&tmp);
3568 if (r < 0)
3569 return log_oom();
f703cc2c 3570
1f68f772
ZJS		 3571 r = sscanf(prefixlen_str,
3572 "%hhu/%hhu/%"SCNu32"/%"PRIu32"/"USEC_FMT,
3573 &tmp->dst_prefixlen,
3574 &tmp->tos,
3575 &tmp->priority,
3576 &tmp->table,
3577 &tmp->lifetime);
3578 if (r != 5) {
3579 log_link_debug(link,
3580 "Failed to parse destination prefix length, tos, priority, table or expiration %s",
3581 prefixlen_str);
3582 continue;
3583 }
f1368755 3584
1f68f772
ZJS		 3585 r = in_addr_from_string_auto(route_str, &tmp->family, &tmp->dst);
3586 if (r < 0) {
3587 log_link_debug_errno(link, r, "Failed to parse route destination %s: %m", route_str);
3588 continue;
3589 }
f703cc2c 3590
1f68f772
ZJS		 3591 r = route_add(link, tmp, &route);
3592 if (r < 0)
3593 return log_link_error_errno(link, r, "Failed to add route: %m");
f703cc2c 3594
1f68f772
ZJS		 3595 if (route->lifetime != USEC_INFINITY && !kernel_route_expiration_supported()) {
3596 r = sd_event_add_time(link->manager->event, &expire,
3597 clock_boottime_or_monotonic(),
3598 route->lifetime, 0, route_expire_handler, route);
f703cc2c 3599 if (r < 0)
1f68f772 3600 log_link_warning_errno(link, r, "Could not arm route expiration handler: %m");
f703cc2c 3601 }
1f68f772
ZJS		 3602
3603 sd_event_source_unref(route->expire);
3604 route->expire = TAKE_PTR(expire);
f703cc2c
TG		 3605 }
3606
0bc70f1d
TG		 3607 if (dhcp4_address) {
3608 r = in_addr_from_string(AF_INET, dhcp4_address, &address);
3609 if (r < 0) {
b68d26b8 3610 log_link_debug_errno(link, r, "Failed to parse DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3611 goto dhcp4_address_fail;
3612 }
3613
b1c626f6 3614 r = sd_dhcp_client_new(&link->dhcp_client, link->network ? link->network->dhcp_anonymize : 0);
0bc70f1d 3615 if (r < 0)
b68d26b8 3616 return log_link_error_errno(link, r, "Failed to create DHCPv4 client: %m");
0bc70f1d 3617
1b43e246
DS		 3618 r = sd_dhcp_client_attach_event(link->dhcp_client, NULL, 0);
3619 if (r < 0)
3620 return log_link_error_errno(link, r, "Failed to attach DHCPv4 event: %m");
3621
0bc70f1d
TG		 3622 r = sd_dhcp_client_set_request_address(link->dhcp_client, &address.in);
3623 if (r < 0)
b68d26b8 3624 return log_link_error_errno(link, r, "Failed to set initial DHCPv4 address %s: %m", dhcp4_address);
0bc70f1d
TG		 3625 }
3626
3627dhcp4_address_fail:
3628
3629 if (ipv4ll_address) {
3630 r = in_addr_from_string(AF_INET, ipv4ll_address, &address);
3631 if (r < 0) {
b68d26b8 3632 log_link_debug_errno(link, r, "Failed to parse IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3633 goto ipv4ll_address_fail;
3634 }
3635
3636 r = sd_ipv4ll_new(&link->ipv4ll);
3637 if (r < 0)
b68d26b8 3638 return log_link_error_errno(link, r, "Failed to create IPv4LL client: %m");
0bc70f1d 3639
1b43e246
DS		 3640 r = sd_ipv4ll_attach_event(link->ipv4ll, NULL, 0);
3641 if (r < 0)
3642 return log_link_error_errno(link, r, "Failed to attach IPv4LL event: %m");
3643
0bc70f1d
TG		 3644 r = sd_ipv4ll_set_address(link->ipv4ll, &address.in);
3645 if (r < 0)
b68d26b8 3646 return log_link_error_errno(link, r, "Failed to set initial IPv4LL address %s: %m", ipv4ll_address);
0bc70f1d
TG		 3647 }
3648
3649ipv4ll_address_fail:
3650
c4a03a56
TG		 3651 return 0;
3652}
3653
1c4baffc 3654int link_add(Manager *m, sd_netlink_message *message, Link **ret) {
51517f9e 3655 _cleanup_(sd_device_unrefp) sd_device *device = NULL;
505f8da7 3656 char ifindex_str[2 + DECIMAL_STR_MAX(int)];
51517f9e 3657 Link *link;
5a937ea2 3658 int r;
505f8da7
TG		 3659
3660 assert(m);
fbbeb65a 3661 assert(m->rtnl);
505f8da7
TG		 3662 assert(message);
3663 assert(ret);
3664
3665 r = link_new(m, message, ret);
3666 if (r < 0)
3667 return r;
3668
3669 link = *ret;
3670
6a7a4e4d 3671 log_link_debug(link, "Link %d added", link->ifindex);
505f8da7 3672
c4a03a56
TG		 3673 r = link_load(link);
3674 if (r < 0)
3675 return r;
3676
bf331d87
YW		 3677 if (path_is_read_only_fs("/sys") <= 0) {
3678 /* udev should be around */
ae06ab10 3679 sprintf(ifindex_str, "n%d", link->ifindex);
51517f9e
YW		 3680 r = sd_device_new_from_device_id(&device, ifindex_str);
3681 if (r < 0) {
4d59e14f
YW		 3682 log_link_warning_errno(link, r, "Could not find device, waiting for device initialization: %m");
3683 return 0;
5c416fc4 3684 }
505f8da7 3685
5a937ea2 3686 r = sd_device_get_is_initialized(device);
51517f9e 3687 if (r < 0) {
bf331d87 3688 log_link_warning_errno(link, r, "Could not determine whether the device is initialized: %m");
51517f9e
YW		 3689 goto failed;
3690 }
5a937ea2 3691 if (r == 0) {
505f8da7 3692 /* not yet ready */
79008bdd 3693 log_link_debug(link, "link pending udev initialization...");
505f8da7 3694 return 0;
3c4cb064 3695 }
505f8da7 3696
299ad32d
YW		 3697 r = device_is_renaming(device);
3698 if (r < 0) {
bf331d87 3699 log_link_warning_errno(link, r, "Failed to determine the device is being renamed: %m");
299ad32d
YW		 3700 goto failed;
3701 }
3702 if (r > 0) {
bf331d87 3703 log_link_debug(link, "Interface is being renamed, pending initialization.");
299ad32d
YW		 3704 return 0;
3705 }
3706
4f561e8e
TG		 3707 r = link_initialized(link, device);
3708 if (r < 0)
5c416fc4 3709 goto failed;
4f561e8e 3710 } else {
e6bf7774 3711 r = link_initialized_and_synced(link);
4f561e8e 3712 if (r < 0)
5c416fc4 3713 goto failed;
4f561e8e 3714 }
505f8da7 3715
a748b692 3716 return 0;
5c416fc4
TG		 3717failed:
3718 link_enter_failed(link);
3719 return r;
a748b692
TG		 3720}
3721
c601ebf7 3722int link_ipv6ll_gained(Link *link, const struct in6_addr *address) {
e7ab854c
TG		 3723 int r;
3724
3725 assert(link);
3726
3727 log_link_info(link, "Gained IPv6LL");
3728
c601ebf7 3729 link->ipv6ll_address = *address;
e7ab854c
TG		 3730 link_check_ready(link);
3731
b9ea3d2e 3732 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
e7ab854c
TG		 3733 r = link_acquire_ipv6_conf(link);
3734 if (r < 0) {
3735 link_enter_failed(link);
3736 return r;
3737 }
3738 }
3739
3740 return 0;
3741}
3742
9c0a72f9
TG		 3743static int link_carrier_gained(Link *link) {
3744 int r;
3745
3746 assert(link);
3747
0894cfe4 3748 r = wifi_get_info(link);
8d968fdd
YW		 3749 if (r < 0)
3750 return r;
3751 if (r > 0) {
572b21d9
YW		 3752 r = link_reconfigure_internal(link, NULL, false);
3753 if (r < 0) {
3754 link_enter_failed(link);
8d968fdd 3755 return r;
572b21d9 3756 }
8d968fdd
YW		 3757 }
3758
b9ea3d2e 3759 if (IN_SET(link->state, LINK_STATE_CONFIGURING, LINK_STATE_CONFIGURED)) {
9c0a72f9
TG		 3760 r = link_acquire_conf(link);
3761 if (r < 0) {
3762 link_enter_failed(link);
3763 return r;
3764 }
6fc25497 3765
b425c3ae 3766 link_set_state(link, LINK_STATE_CONFIGURING);
289e6774 3767 r = link_request_set_addresses(link);
6fc25497
SS		 3768 if (r < 0)
3769 return r;
9c0a72f9
TG		 3770 }
3771
0d4ad91d
AR		 3772 r = link_handle_bound_by_list(link);
3773 if (r < 0)
3774 return r;
3775
1f241589
YW		 3776 if (!link->bridge_mdb_configured) {
3777 r = link_set_bridge_mdb(link);
3778 if (r < 0)
3779 return r;
3780 }
3781
3782 if (streq_ptr(link->kind, "bridge")) {
3783 Link *slave;
3784
3785 SET_FOREACH(slave, link->slaves) {
3786 if (slave->bridge_mdb_configured)
3787 continue;
3788
3789 r = link_set_bridge_mdb(slave);
3790 if (r < 0)
3791 link_enter_failed(slave);
3792 }
3793 }
3db468ea 3794
9c0a72f9
TG		 3795 return 0;
3796}
3797
3798static int link_carrier_lost(Link *link) {
3799 int r;
3800
3801 assert(link);
3802
25e992ba 3803 if (link->network && link->network->ignore_carrier_loss)
93b4dab5
SS		 3804 return 0;
3805
fbdb6605 3806 /* Some devices reset itself while setting the MTU. This causes the DHCP client fall into a loop.
55dc8c4a
YW		 3807 * setting_mtu keep track whether the device got reset because of setting MTU and does not drop the
3808 * configuration and stop the clients as well. */
97e7fb39
SS		 3809 if (link->setting_mtu)
3810 return 0;
3811
95355a28 3812 r = link_stop_clients(link, false);
9c0a72f9
TG		 3813 if (r < 0) {
3814 link_enter_failed(link);
3815 return r;
3816 }
3817
28464ae0
SS		 3818 if (link_dhcp4_server_enabled(link))
3819 (void) sd_dhcp_server_stop(link->dhcp_server);
45a9eac9 3820
3104883d
SS		 3821 r = link_drop_config(link);
3822 if (r < 0)
3823 return r;
3824
2c7b826d 3825 if (!IN_SET(link->state, LINK_STATE_UNMANAGED, LINK_STATE_PENDING, LINK_STATE_INITIALIZED)) {
f258e948 3826 log_link_debug(link, "State is %s, dropping config", link_state_to_string(link->state));
c436d553
MM		 3827 r = link_drop_foreign_config(link);
3828 if (r < 0)
3829 return r;
3830 }
3104883d 3831
0d4ad91d
AR		 3832 r = link_handle_bound_by_list(link);
3833 if (r < 0)
3834 return r;
3835
9c0a72f9
TG		 3836 return 0;
3837}
3838
3839int link_carrier_reset(Link *link) {
3840 int r;
3841
3842 assert(link);
3843
3844 if (link_has_carrier(link)) {
3845 r = link_carrier_lost(link);
3846 if (r < 0)
3847 return r;
3848
3849 r = link_carrier_gained(link);
3850 if (r < 0)
3851 return r;
3852
6a7a4e4d 3853 log_link_info(link, "Reset carrier");
9c0a72f9
TG		 3854 }
3855
3856 return 0;
3857}
3858
d236718c
DS		 3859/* This is called every time an interface admin state changes to up;
3860 * specifically, when IFF_UP flag changes from unset to set */
3861static int link_admin_state_up(Link *link) {
3862 int r;
3863
3864 /* We set the ipv6 mtu after the device mtu, but the kernel resets
3865 * ipv6 mtu on NETDEV_UP, so we need to reset it. The check for
3866 * ipv6_mtu_set prevents this from trying to set it too early before
3867 * the link->network has been setup; we only need to reset it
3868 * here if we've already set it during normal initialization. */
3869 if (link->ipv6_mtu_set) {
3870 r = link_set_ipv6_mtu(link);
3871 if (r < 0)
3872 return r;
3873 }
3874
3875 return 0;
3876}
3877
1c4baffc 3878int link_update(Link *link, sd_netlink_message *m) {
572b21d9 3879 _cleanup_strv_free_ char **s = NULL;
c49b33ac 3880 struct ether_addr mac;
ca4e095a 3881 const char *ifname;
afe7fd56 3882 uint32_t mtu;
d236718c 3883 bool had_carrier, carrier_gained, carrier_lost, link_was_admin_up;
bb262ef0 3884 int old_master, r;
22936833 3885
dd3efc09 3886 assert(link);
b8941f74 3887 assert(link->ifname);
22936833
TG		 3888 assert(m);
3889
7619683b 3890 if (link->state == LINK_STATE_LINGER) {
5238e957 3891 log_link_info(link, "Link re-added");
289e6774 3892 link_set_state(link, LINK_STATE_CONFIGURING);
0d4ad91d
AR		 3893
3894 r = link_new_carrier_maps(link);
3895 if (r < 0)
3896 return r;
7619683b
TG		 3897 }
3898
1c4baffc 3899 r = sd_netlink_message_read_string(m, IFLA_IFNAME, &ifname);
b8941f74 3900 if (r >= 0 && !streq(ifname, link->ifname)) {
30de2b89 3901 Manager *manager = link->manager;
b8941f74 3902
30de2b89 3903 log_link_info(link, "Interface name change detected, %s has been renamed to %s.", link->ifname, ifname);
0d4ad91d 3904
30de2b89
YW		 3905 link_drop(link);
3906 r = link_add(manager, m, &link);
3907 if (r < 0)
3908 return r;
b8941f74
TG		 3909 }
3910
572b21d9
YW		 3911 r = sd_netlink_message_read_strv(m, IFLA_PROP_LIST, IFLA_ALT_IFNAME, &s);
3912 if (r >= 0)
3913 strv_free_and_replace(link->alternative_names, s);
3914
1c4baffc 3915 r = sd_netlink_message_read_u32(m, IFLA_MTU, &mtu);
afe7fd56
TG		 3916 if (r >= 0 && mtu > 0) {
3917 link->mtu = mtu;
4e964aa0 3918 if (link->original_mtu == 0) {
afe7fd56 3919 link->original_mtu = mtu;
6a7a4e4d 3920 log_link_debug(link, "Saved original MTU: %" PRIu32, link->original_mtu);
afe7fd56
TG		 3921 }
3922
3923 if (link->dhcp_client) {
3c9b8860
TG		 3924 r = sd_dhcp_client_set_mtu(link->dhcp_client,
3925 link->mtu);
fc95c359
YW		 3926 if (r < 0)
3927 return log_link_warning_errno(link, r, "Could not update MTU in DHCP client: %m");
afe7fd56 3928 }
7465dd22
PF		 3929
3930 if (link->radv) {
3931 r = sd_radv_set_mtu(link->radv, link->mtu);
3932 if (r < 0)
3933 return log_link_warning_errno(link, r, "Could not set MTU for Router Advertisement: %m");
3934 }
9842de0d 3935 }
69629de9 3936
e9189a1f
TG		 3937 /* The kernel may broadcast NEWLINK messages without the MAC address
3938 set, simply ignore them. */
1c4baffc 3939 r = sd_netlink_message_read_ether_addr(m, IFLA_ADDRESS, &mac);
807667f7
YW		 3940 if (r >= 0 && memcmp(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN) != 0) {
3941
3942 memcpy(link->mac.ether_addr_octet, mac.ether_addr_octet, ETH_ALEN);
3943
3944 log_link_debug(link, "Gained new MAC address: "
3945 "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
3946 mac.ether_addr_octet[0],
3947 mac.ether_addr_octet[1],
3948 mac.ether_addr_octet[2],
3949 mac.ether_addr_octet[3],
3950 mac.ether_addr_octet[4],
3951 mac.ether_addr_octet[5]);
3952
3953 if (link->ipv4ll) {
3954 bool restart = sd_ipv4ll_is_running(link->ipv4ll) > 0;
3955
3956 if (restart) {
3957 r = sd_ipv4ll_stop(link->ipv4ll);
6a7a4e4d 3958 if (r < 0)
807667f7 3959 return log_link_warning_errno(link, r, "Could not stop IPv4LL client: %m");
c49b33ac 3960 }
c49b33ac 3961
807667f7
YW		 3962 r = sd_ipv4ll_set_mac(link->ipv4ll, &link->mac);
3963 if (r < 0)
3964 return log_link_warning_errno(link, r, "Could not update MAC address in IPv4LL client: %m");
3965
3966 if (restart) {
3967 r = sd_ipv4ll_start(link->ipv4ll);
6a7a4e4d 3968 if (r < 0)
807667f7
YW		 3969 return log_link_warning_errno(link, r, "Could not restart IPv4LL client: %m");
3970 }
3971 }
3972
3973 if (link->dhcp_client) {
3974 r = sd_dhcp_client_set_mac(link->dhcp_client,
3975 (const uint8_t *) &link->mac,
3976 sizeof (link->mac),
3977 ARPHRD_ETHER);
3978 if (r < 0)
3979 return log_link_warning_errno(link, r, "Could not update MAC address in DHCP client: %m");
3980
3981 r = dhcp4_set_client_identifier(link);
3982 if (r < 0)
3983 return log_link_warning_errno(link, r, "Could not set DHCP client identifier: %m");
3984 }
413708d1 3985
807667f7
YW		 3986 if (link->dhcp6_client) {
3987 const DUID* duid = link_get_duid(link);
3988 bool restart = sd_dhcp6_client_is_running(link->dhcp6_client) > 0;
3989
3990 if (restart) {
3991 r = sd_dhcp6_client_stop(link->dhcp6_client);
fff1f40c 3992 if (r < 0)
807667f7 3993 return log_link_warning_errno(link, r, "Could not stop DHCPv6 client: %m");
c49b33ac 3994 }
4138fb2c 3995
807667f7
YW		 3996 r = sd_dhcp6_client_set_mac(link->dhcp6_client,
3997 (const uint8_t *) &link->mac,
3998 sizeof (link->mac),
3999 ARPHRD_ETHER);
4000 if (r < 0)
4001 return log_link_warning_errno(link, r, "Could not update MAC address in DHCPv6 client: %m");
8341a5c3 4002
807667f7
YW		 4003 if (link->network->iaid_set) {
4004 r = sd_dhcp6_client_set_iaid(link->dhcp6_client, link->network->iaid);
6a7a4e4d 4005 if (r < 0)
807667f7
YW		 4006 return log_link_warning_errno(link, r, "Could not update DHCPv6 IAID: %m");
4007 }
4008
4009 r = sd_dhcp6_client_set_duid(link->dhcp6_client,
4010 duid->type,
4011 duid->raw_data_len > 0 ? duid->raw_data : NULL,
4012 duid->raw_data_len);
4013 if (r < 0)
4014 return log_link_warning_errno(link, r, "Could not update DHCPv6 DUID: %m");
4015
4016 if (restart) {
4017 r = sd_dhcp6_client_start(link->dhcp6_client);
413708d1 4018 if (r < 0)
807667f7 4019 return log_link_warning_errno(link, r, "Could not restart DHCPv6 client: %m");
4138fb2c 4020 }
807667f7 4021 }
7465dd22 4022
807667f7
YW		 4023 if (link->radv) {
4024 bool restart = sd_radv_is_running(link->radv);
4025
4026 if (restart) {
4027 r = sd_radv_stop(link->radv);
7465dd22 4028 if (r < 0)
807667f7 4029 return log_link_warning_errno(link, r, "Could not stop Router Advertisement: %m");
7465dd22 4030 }
420d2058 4031
807667f7
YW		 4032 r = sd_radv_set_mac(link->radv, &link->mac);
4033 if (r < 0)
4034 return log_link_warning_errno(link, r, "Could not update MAC for Router Advertisement: %m");
4035
4036 if (restart) {
4037 r = sd_radv_start(link->radv);
420d2058 4038 if (r < 0)
807667f7 4039 return log_link_warning_errno(link, r, "Could not restart Router Advertisement: %m");
420d2058 4040 }
c49b33ac 4041 }
807667f7
YW		 4042
4043 if (link->ndisc) {
4044 r = sd_ndisc_set_mac(link->ndisc, &link->mac);
4045 if (r < 0)
4046 return log_link_warning_errno(link, r, "Could not update MAC for NDisc: %m");
4047 }
4f882b2a
TG		 4048 }
4049
bb262ef0
YW		 4050 old_master = link->master_ifindex;
4051 (void) sd_netlink_message_read_u32(m, IFLA_MASTER, (uint32_t *) &link->master_ifindex);
4052
d236718c 4053 link_was_admin_up = link->flags & IFF_UP;
a61bb41c
TG		 4054 had_carrier = link_has_carrier(link);
4055
bb262ef0 4056 r = link_update_flags(link, m, old_master != link->master_ifindex);
a61bb41c
TG		 4057 if (r < 0)
4058 return r;
4059
d236718c
DS		 4060 if (!link_was_admin_up && (link->flags & IFF_UP)) {
4061 log_link_info(link, "Link UP");
4062
4063 r = link_admin_state_up(link);
4064 if (r < 0)
4065 return r;
4066 } else if (link_was_admin_up && !(link->flags & IFF_UP))
4067 log_link_info(link, "Link DOWN");
4068
273eec24
LP		 4069 r = link_update_lldp(link);
4070 if (r < 0)
4071 return r;
4072
a61bb41c
TG		 4073 carrier_gained = !had_carrier && link_has_carrier(link);
4074 carrier_lost = had_carrier && !link_has_carrier(link);
4075
4076 if (carrier_gained) {
6a7a4e4d 4077 log_link_info(link, "Gained carrier");
a61bb41c 4078
9c0a72f9
TG		 4079 r = link_carrier_gained(link);
4080 if (r < 0)
4081 return r;
a61bb41c 4082 } else if (carrier_lost) {
6a7a4e4d 4083 log_link_info(link, "Lost carrier");
a61bb41c 4084
9c0a72f9
TG		 4085 r = link_carrier_lost(link);
4086 if (r < 0)
a61bb41c 4087 return r;
a61bb41c
TG		 4088 }
4089
4090 return 0;
dd3efc09 4091}
fe8db0c5 4092
b295beea
LP		 4093static void print_link_hashmap(FILE *f, const char *prefix, Hashmap* h) {
4094 bool space = false;
b295beea
LP		 4095 Link *link;
4096
4097 assert(f);
4098 assert(prefix);
4099
4100 if (hashmap_isempty(h))
4101 return;
4102
0d536673 4103 fputs(prefix, f);
90e74a66 4104 HASHMAP_FOREACH(link, h) {
b295beea 4105 if (space)
0d536673 4106 fputc(' ', f);
b295beea
LP		 4107
4108 fprintf(f, "%i", link->ifindex);
4109 space = true;
4110 }
4111
0d536673 4112 fputc('\n', f);
b295beea
LP		 4113}
4114
64581765 4115static void link_save_dns(Link *link, FILE *f, struct in_addr_full **dns, unsigned n_dns, bool *space) {
dddc8d1e 4116 for (unsigned j = 0; j < n_dns; j++) {
e77bd3fd 4117 const char *str;
15761549 4118
64581765
YW		 4119 if (dns[j]->ifindex != 0 && dns[j]->ifindex != link->ifindex)
4120 continue;
4121
e77bd3fd
YW		 4122 str = in_addr_full_to_string(dns[j]);
4123 if (!str)
15761549 4124 continue;
15761549
YW		 4125
4126 if (*space)
4127 fputc(' ', f);
e77bd3fd 4128 fputs(str, f);
15761549
YW		 4129 *space = true;
4130 }
4131}
4132
d5e172d2
ZJS		 4133static void serialize_addresses(
4134 FILE *f,
4135 const char *lvalue,
4136 bool *space,
4137 char **addresses,
4138 sd_dhcp_lease *lease,
4139 bool conditional,
ddb82ec2 4140 sd_dhcp_lease_server_type what,
d5e172d2
ZJS		 4141 sd_dhcp6_lease *lease6,
4142 bool conditional6,
4143 int (*lease6_get_addr)(sd_dhcp6_lease*, const struct in6_addr**),
4144 int (*lease6_get_fqdn)(sd_dhcp6_lease*, char ***)) {
4145 int r;
4146
4147 bool _space = false;
4148 if (!space)
4149 space = &_space;
4150
4151 if (lvalue)
4152 fprintf(f, "%s=", lvalue);
4153 fputstrv(f, addresses, NULL, space);
4154
4155 if (lease && conditional) {
4156 const struct in_addr *lease_addresses;
4157
4158 r = sd_dhcp_lease_get_servers(lease, what, &lease_addresses);
4159 if (r > 0)
d8bff5cc 4160 serialize_in_addrs(f, lease_addresses, r, space, in4_addr_is_non_local);
d5e172d2
ZJS		 4161 }
4162
4163 if (lease6 && conditional6 && lease6_get_addr) {
4164 const struct in6_addr *in6_addrs;
4165
4166 r = lease6_get_addr(lease6, &in6_addrs);
d8bff5cc
ZJS		 4167 if (r > 0)
4168 serialize_in6_addrs(f, in6_addrs, r, space);
d5e172d2
ZJS		 4169 }
4170
4171 if (lease6 && conditional6 && lease6_get_fqdn) {
4172 char **in6_hosts;
4173
4174 r = lease6_get_fqdn(lease6, &in6_hosts);
4175 if (r > 0)
4176 fputstrv(f, in6_hosts, NULL, space);
4177 }
4178
4179 if (lvalue)
4180 fputc('\n', f);
4181}
4182
fe8db0c5 4183int link_save(Link *link) {
d361b373 4184 const char *admin_state, *oper_state, *carrier_state, *address_state;
68a8723c 4185 _cleanup_free_ char *temp_path = NULL;
fe8db0c5 4186 _cleanup_fclose_ FILE *f = NULL;
c1eb9872 4187 Route *route;
18d8a2cf 4188 Address *a;
fe8db0c5
TG		 4189 int r;
4190
4191 assert(link);
4192 assert(link->state_file);
68a8723c 4193 assert(link->lease_file);
bbf7c048
TG		 4194 assert(link->manager);
4195
370e9930 4196 if (link->state == LINK_STATE_LINGER) {
6990fb6b 4197 (void) unlink(link->state_file);
370e9930
TG		 4198 return 0;
4199 }
4200
34437b4f
LP		 4201 link_lldp_save(link);
4202
deb2e523
TG		 4203 admin_state = link_state_to_string(link->state);
4204 assert(admin_state);
4205
e375dcde
TG		 4206 oper_state = link_operstate_to_string(link->operstate);
4207 assert(oper_state);
deb2e523 4208
ac999bf0
YW		 4209 carrier_state = link_carrier_state_to_string(link->carrier_state);
4210 assert(carrier_state);
4211
4212 address_state = link_address_state_to_string(link->address_state);
4213 assert(address_state);
4214
fe8db0c5
TG		 4215 r = fopen_temporary(link->state_file, &f, &temp_path);
4216 if (r < 0)
6a7a4e4d 4217 goto fail;
fe8db0c5 4218
5512a963 4219 (void) fchmod(fileno(f), 0644);
fe8db0c5
TG		 4220
4221 fprintf(f,
4222 "# This is private data. Do not parse.\n"
deb2e523 4223 "ADMIN_STATE=%s\n"
ac999bf0
YW		 4224 "OPER_STATE=%s\n"
4225 "CARRIER_STATE=%s\n"
4226 "ADDRESS_STATE=%s\n",
4227 admin_state, oper_state, carrier_state, address_state);
fe8db0c5 4228
bcb7a07e 4229 if (link->network) {
fe0e16db
YW		 4230 char **dhcp6_domains = NULL, **dhcp_domains = NULL;
4231 const char *dhcp_domainname = NULL, *p;
fe0e16db 4232 bool space;
07bdc70d 4233
c1a38904
MTL		 4234 fprintf(f, "REQUIRED_FOR_ONLINE=%s\n",
4235 yes_no(link->network->required_for_online));
4236
d5e172d2
ZJS		 4237 LinkOperationalStateRange st = link->network->required_operstate_for_online;
4238 fprintf(f, "REQUIRED_OPER_STATE_FOR_ONLINE=%s%s%s\n",
4239 strempty(link_operstate_to_string(st.min)),
4240 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? ":" : "",
4241 st.max != LINK_OPERSTATE_RANGE_DEFAULT.max ? strempty(link_operstate_to_string(st.max)) : "");
4ac77d63 4242
adc5b2e2
TG		 4243 fprintf(f, "NETWORK_FILE=%s\n", link->network->filename);
4244
d5e172d2
ZJS		 4245 /************************************************************/
4246
0d536673 4247 fputs("DNS=", f);
ea352b40 4248 space = false;
15761549 4249 if (link->n_dns != (unsigned) -1)
64581765 4250 link_save_dns(link, f, link->dns, link->n_dns, &space);
15761549 4251 else
64581765 4252 link_save_dns(link, f, link->network->dns, link->network->n_dns, &space);
d5314fff 4253
d5e172d2
ZJS		 4254 serialize_addresses(f, NULL, &space,
4255 NULL,
4256 link->dhcp_lease,
4257 link->network->dhcp_use_dns,
ddb82ec2 4258 SD_DHCP_LEASE_DNS,
1633c457 4259 link->dhcp6_lease,
d5e172d2
ZJS		 4260 link->network->dhcp6_use_dns,
4261 sd_dhcp6_lease_get_dns,
4262 NULL);
1e7a0e21 4263
a8c10331 4264 /* Make sure to flush out old entries before we use the NDisc data */
1e7a0e21
LP		 4265 ndisc_vacuum(link);
4266
b296797f 4267 if (link->network->ipv6_accept_ra_use_dns && link->ndisc_rdnss) {
1e7a0e21
LP		 4268 NDiscRDNSS *dd;
4269
90e74a66 4270 SET_FOREACH(dd, link->ndisc_rdnss)
d8bff5cc 4271 serialize_in6_addrs(f, &dd->address, 1, &space);
299d578f
SS		 4272 }
4273
4274 fputc('\n', f);
4275
d5e172d2
ZJS		 4276 /************************************************************/
4277
4278 serialize_addresses(f, "NTP", NULL,
4279 link->ntp ?: link->network->ntp,
4280 link->dhcp_lease,
4281 link->network->dhcp_use_ntp,
ddb82ec2 4282 SD_DHCP_LEASE_NTP,
1633c457 4283 link->dhcp6_lease,
d5e172d2
ZJS		 4284 link->network->dhcp6_use_ntp,
4285 sd_dhcp6_lease_get_ntp_addrs,
4286 sd_dhcp6_lease_get_ntp_fqdn);
4287
4288 serialize_addresses(f, "SIP", NULL,
2a71d57f 4289 NULL,
d5e172d2
ZJS		 4290 link->dhcp_lease,
4291 link->network->dhcp_use_sip,
ddb82ec2 4292 SD_DHCP_LEASE_SIP,
2a71d57f 4293 NULL, false, NULL, NULL);
d5e172d2
ZJS		 4294
4295 /************************************************************/
bd8f6538 4296
b2a81c0b 4297 if (link->network->dhcp_use_domains != DHCP_USE_DOMAINS_NO) {
b85bc551 4298 if (link->dhcp_lease) {
b2a81c0b 4299 (void) sd_dhcp_lease_get_domainname(link->dhcp_lease, &dhcp_domainname);
b85bc551
DW		 4300 (void) sd_dhcp_lease_get_search_domains(link->dhcp_lease, &dhcp_domains);
4301 }
1633c457
YW		 4302 if (link->dhcp6_lease)
4303 (void) sd_dhcp6_lease_get_domains(link->dhcp6_lease, &dhcp6_domains);
07bdc70d
PF		 4304 }
4305
fe0e16db
YW		 4306 fputs("DOMAINS=", f);
4307 space = false;
90e74a66 4308 ORDERED_SET_FOREACH(p, link->search_domains ?: link->network->search_domains)
fe0e16db 4309 fputs_with_space(f, p, NULL, &space);
07bdc70d 4310
1e7a0e21 4311 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_YES) {
1e7a0e21
LP		 4312 if (dhcp_domainname)
4313 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4314 if (dhcp_domains)
4315 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4316 if (dhcp6_domains)
4317 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4318 }
4319
4320 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_YES) {
4321 NDiscDNSSL *dd;
1e7a0e21 4322
90e74a66 4323 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4324 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4325 }
b2a81c0b 4326
0d536673 4327 fputc('\n', f);
6192b846 4328
d5e172d2
ZJS		 4329 /************************************************************/
4330
fe0e16db
YW		 4331 fputs("ROUTE_DOMAINS=", f);
4332 space = false;
90e74a66 4333 ORDERED_SET_FOREACH(p, link->route_domains ?: link->network->route_domains)
fe0e16db 4334 fputs_with_space(f, p, NULL, &space);
b2a81c0b 4335
1e7a0e21 4336 if (link->network->dhcp_use_domains == DHCP_USE_DOMAINS_ROUTE) {
1e7a0e21
LP		 4337 if (dhcp_domainname)
4338 fputs_with_space(f, dhcp_domainname, NULL, &space);
b85bc551
DW		 4339 if (dhcp_domains)
4340 fputstrv(f, dhcp_domains, NULL, &space);
1e7a0e21
LP		 4341 if (dhcp6_domains)
4342 fputstrv(f, dhcp6_domains, NULL, &space);
a0cd6da5
YW		 4343 }
4344
4345 if (link->network->ipv6_accept_ra_use_domains == DHCP_USE_DOMAINS_ROUTE) {
4346 NDiscDNSSL *dd;
1e7a0e21 4347
90e74a66 4348 SET_FOREACH(dd, link->ndisc_dnssl)
1e7a0e21
LP		 4349 fputs_with_space(f, NDISC_DNSSL_DOMAIN(dd), NULL, &space);
4350 }
b2a81c0b 4351
0d536673 4352 fputc('\n', f);
67272d15 4353
d5e172d2
ZJS		 4354 /************************************************************/
4355
3c9b8860 4356 fprintf(f, "LLMNR=%s\n",
15761549 4357 resolve_support_to_string(link->llmnr >= 0 ? link->llmnr : link->network->llmnr));
d5e172d2
ZJS		 4358
4359 /************************************************************/
4360
aaa297d4 4361 fprintf(f, "MDNS=%s\n",
15761549 4362 resolve_support_to_string(link->mdns >= 0 ? link->mdns : link->network->mdns));
15761549 4363
d5e172d2
ZJS		 4364 /************************************************************/
4365
4366 int dns_default_route =
4367 link->dns_default_route >= 0 ? link->dns_default_route :
4368 link->network->dns_default_route;
4369 if (dns_default_route >= 0)
4370 fprintf(f, "DNS_DEFAULT_ROUTE=%s\n", yes_no(dns_default_route));
4371
4372 /************************************************************/
4373
4374 DnsOverTlsMode dns_over_tls_mode =
4375 link->dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID ? link->dns_over_tls_mode :
4376 link->network->dns_over_tls_mode;
4377 if (dns_over_tls_mode != _DNS_OVER_TLS_MODE_INVALID)
4378 fprintf(f, "DNS_OVER_TLS=%s\n", dns_over_tls_mode_to_string(dns_over_tls_mode));
4379
4380 /************************************************************/
4381
4382 DnssecMode dnssec_mode =
4383 link->dnssec_mode != _DNSSEC_MODE_INVALID ? link->dnssec_mode :
4384 link->network->dnssec_mode;
4385 if (dnssec_mode != _DNSSEC_MODE_INVALID)
4386 fprintf(f, "DNSSEC=%s\n", dnssec_mode_to_string(dnssec_mode));
4387
4388 /************************************************************/
4389
4390 Set *nta_anchors = link->dnssec_negative_trust_anchors;
4391 if (set_isempty(nta_anchors))
4392 nta_anchors = link->network->dnssec_negative_trust_anchors;
4393
4394 if (!set_isempty(nta_anchors)) {
8a516214
LP		 4395 const char *n;
4396
0d536673 4397 fputs("DNSSEC_NTA=", f);
8a516214 4398 space = false;
90e74a66 4399 SET_FOREACH(n, nta_anchors)
d390f8ef 4400 fputs_with_space(f, n, NULL, &space);
0d536673 4401 fputc('\n', f);
8a516214
LP		 4402 }
4403
d5e172d2
ZJS		 4404 /************************************************************/
4405
0d536673 4406 fputs("ADDRESSES=", f);
e7780c8d 4407 space = false;
90e74a66 4408 SET_FOREACH(a, link->addresses) {
e7780c8d
TG		 4409 _cleanup_free_ char *address_str = NULL;
4410
4411 r = in_addr_to_string(a->family, &a->in_addr, &address_str);
4412 if (r < 0)
4413 goto fail;
4414
e7780c8d
TG		 4415 fprintf(f, "%s%s/%u", space ? " " : "", address_str, a->prefixlen);
4416 space = true;
4417 }
0d536673 4418 fputc('\n', f);
c1eb9872 4419
d5e172d2
ZJS		 4420 /************************************************************/
4421
0d536673 4422 fputs("ROUTES=", f);
c1eb9872 4423 space = false;
90e74a66 4424 SET_FOREACH(route, link->routes) {
c1eb9872
TG		 4425 _cleanup_free_ char *route_str = NULL;
4426
4427 r = in_addr_to_string(route->family, &route->dst, &route_str);
4428 if (r < 0)
4429 goto fail;
4430
ecc3f340
ZJS		 4431 fprintf(f, "%s%s/%hhu/%hhu/%"PRIu32"/%"PRIu32"/"USEC_FMT,
4432 space ? " " : "", route_str,
f833694d 4433 route->dst_prefixlen, route->tos, route->priority, route->table, route->lifetime);
c1eb9872
TG		 4434 space = true;
4435 }
4436
0d536673 4437 fputc('\n', f);
bcb7a07e 4438 }
7374f9d8 4439
b295beea
LP		 4440 print_link_hashmap(f, "CARRIER_BOUND_TO=", link->bound_to_links);
4441 print_link_hashmap(f, "CARRIER_BOUND_BY=", link->bound_by_links);
0d4ad91d 4442
8eb9058d 4443 if (link->dhcp_lease) {
bd91b83e 4444 r = dhcp_lease_save(link->dhcp_lease, link->lease_file);
fe8db0c5 4445 if (r < 0)
c2d6bd61 4446 goto fail;
fe8db0c5 4447
7374f9d8 4448 fprintf(f,
b0e39c82
TG		 4449 "DHCP_LEASE=%s\n",
4450 link->lease_file);
deb2e523 4451 } else
6990fb6b 4452 (void) unlink(link->lease_file);
fe8db0c5 4453
0bc70f1d
TG		 4454 if (link->ipv4ll) {
4455 struct in_addr address;
4456
4457 r = sd_ipv4ll_get_address(link->ipv4ll, &address);
4458 if (r >= 0) {
0d536673 4459 fputs("IPV4LL_ADDRESS=", f);
072320ea 4460 serialize_in_addrs(f, &address, 1, false, NULL);
0d536673 4461 fputc('\n', f);
0bc70f1d
TG		 4462 }
4463 }
4464
7e738e7b
SS		 4465 if (link->dhcp6_client) {
4466 _cleanup_free_ char *duid = NULL;
4467 uint32_t iaid;
4468
4469 r = sd_dhcp6_client_get_iaid(link->dhcp6_client, &iaid);
4470 if (r >= 0)
4471 fprintf(f, "DHCP6_CLIENT_IAID=0x%x\n", iaid);
4472
4473 r = sd_dhcp6_client_duid_as_string(link->dhcp6_client, &duid);
4474 if (r >= 0)
4475 fprintf(f, "DHCP6_CLIENT_DUID=%s\n", duid);
4476 }
18d8a2cf 4477
c2d6bd61
LP		 4478 r = fflush_and_check(f);
4479 if (r < 0)
4480 goto fail;
fe8db0c5 4481
c2d6bd61 4482 if (rename(temp_path, link->state_file) < 0) {
fe8db0c5 4483 r = -errno;
c2d6bd61 4484 goto fail;
fe8db0c5
TG		 4485 }
4486
c2d6bd61 4487 return 0;
dacd6cee 4488
c2d6bd61 4489fail:
6a7a4e4d 4490 (void) unlink(link->state_file);
6a7a4e4d
LP		 4491 if (temp_path)
4492 (void) unlink(temp_path);
4493
dacd6cee 4494 return log_link_error_errno(link, r, "Failed to save link data to %s: %m", link->state_file);
fe8db0c5
TG		 4495}
4496
84de38c5
TG		 4497/* The serialized state in /run is no longer up-to-date. */
4498void link_dirty(Link *link) {
4499 int r;
4500
4501 assert(link);
4502
0c241a37
SS		 4503 /* mark manager dirty as link is dirty */
4504 manager_dirty(link->manager);
4505
de7fef4b 4506 r = set_ensure_put(&link->manager->dirty_links, NULL, link);
0c241a37 4507 if (r <= 0)
de7fef4b 4508 /* Ignore allocation errors and don't take another ref if the link was already dirty */
84de38c5 4509 return;
84de38c5
TG		 4510 link_ref(link);
4511}
4512
4513/* The serialized state in /run is up-to-date */
4514void link_clean(Link *link) {
4515 assert(link);
4516 assert(link->manager);
4517
1046bf9b 4518 link_unref(set_remove(link->manager->dirty_links, link));
84de38c5
TG		 4519}
4520
c2a65950
YW		 4521int link_save_and_clean(Link *link) {
4522 int r;
4523
4524 r = link_save(link);
4525 if (r < 0)
4526 return r;
4527
4528 link_clean(link);
4529 return 0;
4530}
4531
fe8db0c5 4532static const char* const link_state_table[_LINK_STATE_MAX] = {
8434fd5c 4533 [LINK_STATE_PENDING] = "pending",
bd08ce56 4534 [LINK_STATE_INITIALIZED] = "initialized",
289e6774 4535 [LINK_STATE_CONFIGURING] = "configuring",
fe8db0c5 4536 [LINK_STATE_CONFIGURED] = "configured",
57bd6899 4537 [LINK_STATE_UNMANAGED] = "unmanaged",
fe8db0c5 4538 [LINK_STATE_FAILED] = "failed",
370e9930 4539 [LINK_STATE_LINGER] = "linger",
fe8db0c5
TG		 4540};
4541
4542DEFINE_STRING_TABLE_LOOKUP(link_state, LinkState);
5ecb131d
YW		 4543
4544int log_link_message_full_errno(Link *link, sd_netlink_message *m, int level, int err, const char *msg) {
4545 const char *err_msg = NULL;
4546
4547 (void) sd_netlink_message_read_string(m, NLMSGERR_ATTR_MSG, &err_msg);
d157714b
YW		 4548 return log_link_full_errno(link, level, err,
4549 "%s: %s%s%s%m",
4550 msg,
4551 strempty(err_msg),
4552 err_msg && !endswith(err_msg, ".") ? "." : "",
4553 err_msg ? " " : "");
5ecb131d 4554}
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